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$1.5M NSF Grant Helps Nanoparticle Manufacturing

Sep. 2013- Making large quantities of reliable, inexpensive nanoparticles for batteries, solar cells, catalysts and other energy applications has proven challenging due to manufacturing limits. A Cornell research team is working to improve such processes with a $1.5 million National Science Foundation (NSF) grant to support scalable nanomanufacturing and device integration.

UMass Amherst Chemist to Bring Low-Cost, Inkjet-printed Nano Test Strips to Pakistan for Drinking Water Tests

Jul. 2013- Invention holds promise for improving health of millions around the worldOn July 1, 2013, the National Academy of Sciences announced a three-year, $271,930 grant to chemist Vincent Rotello at the University of Massachusetts Amherst to develop, test and deploy new, sensitive, reliable and affordable inkjet-printed, nanoparticle-based test strips for detecting disease-causing bacteria in drinking ...

New Product Features with Metallic Nanoparticles

Jun. 2013- VTT Technical Research Centre of Finland is developing new techniques for the production of metallic nanoparticles. VTT’s new production reactor, operating at atmospheric pressure, reduces the production costs of multicomponent particles. It enables the production of metallic nanomaterials, which are not yet commercially available, for research and product development needs.

DNA and Quantum Dots: All That Glitters is Not Gold

Jan. 2013- A team of researchers at the National Institute of Standards and Technology (NIST) has shown that by bringing gold nanoparticles close to the dots and using a DNA template to control the distances, the intensity of a quantum dot's fluorescence can be predictably increased or decreased.* This breakthrough opens a potential path to using quantum dots as a component in better photodetectors, ...

UMass Amherst Chemists Develop Nose-like Sensor Array to 'Smell' Cancer Diagnoses

Sep. 2012- In the fight against cancer, knowing the enemy’s exact identity is crucial for diagnosis and treatment, especially in metastatic cancers, those that spread between organs and tissues. Now chemists led by Vincent Rotello at the University of Massachusetts Amherst have developed a rapid, sensitive way to detect microscopic levels of many different metastatic cell types in living tissue. ...

UCSB Scientists Examine Effects of Manufactured Nanoparticles on Soybean Crops

Aug. 2012- Sunscreens, lotions, and cosmetics contain tiny metal nanoparticles that wash down the drain at the end of the day, or are discharged after manufacturing. Those nanoparticles eventually end up in agricultural soil, which is a cause for concern, according to a group of environmental scientists that recently carried out the first major study of soybeans grown in soil contaminated by two ...

Nanotechnology…naturally delicious

Jul. 2012- You’re invited to a nanotechnology picnic. Nature will provide the food.Hungry for a little knowledge about the nature of nanotechnology? Good. I’ve put together a gourmet picnic of tasty facts about nanotechnology that’s been on the menu every day, for thousands (and thousands) of years. Yes, nanoscale materials have long been part of our food supply – including the way ...

Chipping Away at Cancer

Jun. 2012- In the last two decades, the number of deaths from col­orectal cancer has steadily declined, according to the Amer­ican Cancer Society. While some of the decrease can be attrib­uted to better treat­ment prac­tices, early detec­tion is another pri­mary factor. Nonethe­less, col­orectal cancer is still the second leading cause of death among men and women in the ...

NIST/UMass Study Finds Evidence Nanoparticles May Increase Plant DNA Damage

Apr. 2012- Researchers at the National Institute of Standards and Technology (NIST) and the University of Massachusetts Amherst (UMass) have provided the first evidence that engineered nanoparticles are able to accumulate within plants and damage their DNA. In a recent paper,* the team led by NIST chemist Bryant C. Nelson showed that under laboratory conditions, cupric oxide nanoparticles have the capacity ...

The Shape of Things to Come: NIST Probes the Promise of Nanomanufacturing Using DNA Origami

Mar. 2012- In recent years, scientists have begun to harness DNA’s powerful molecular machinery to build artificial structures at the nanoscale using the natural ability of pairs of DNA molecules to assemble into complex structures. Such “DNA origami,” first developed at the California Institute of Technology,* could provide a means of assembling complex nanostructures such as ...

New Measuring Techniques Can Improve Efficiency, Safety of Nanoparticles

Mar. 2012- Eugene, OR | February 28th, 2012Using high-precision microscopy and X-ray scattering techniques, University of Oregon researchers have gained eye-opening insights into the process of applying green chemistry to nanotechnology that results in high yields, improves efficiency and dramatically reduces waste and potential negative exposure to human health or the environment. University of Oregon ...

Additive-Driven Assembly of Block Copolymer-Nanoparticle Hybrid Materials for Solution Processable Floating Gate Memory

Feb. 2012- Floating gate memory devices were fabricated using well-ordered gold nanoparticle/block copolymer hybrid films as the charge-trapping layers, SiO2 as the dielectric layer and poly(3-hexylthiophene) as the semiconductor layer.  The charge-trapping layer was prepared via self-assembly. The addition of Au nanoparticles that selectively hydrogen-bond with pyridine in a poly(styrene-b-2-vinyl ...

Hacking the SEM: Crystal Phase Detection for Nanoscale Samples

Jan. 2012- Custom modifications of equipment are an honored tradition of the research lab. In a recent paper,* two materials scientists at the National Institute of Standards and Technology (NIST) describe how a relatively simple mod of a standard scanning electron microscope (SEM) enables a roughly 10-fold improvement in its ability to measure the crystal structure of nanoparticles and extremely thin ...

Voltage Controlled Drug Release from Nanoparticles for Hybrid Smart Drug Delivery Systems

Jan. 2012- Stimulus-responsive biomaterials are of significant interest as in vivo drug delivery systems. Such materials provide a means for controlled and long-term drug release as new treatments for a range of chronic diseases that require daily injections or precise doses of specific medications. Various materials systems investigated to date have exhibited response to heat, light, pH, enzymes, ...

Selecta Biosciences Initiates Phase 1 Clinical Study of SEL-068, a First-in-Class Synthetic Nicotine Vaccine for Smoking Cessation and Relapse Prevention

Dec. 2011- First Clinical Program for Selecta's Synthetic Vaccine Particle Platform with Broad Potential for a Range of Therapeutic Applications Including Infections, Cancer, Allergies, and Autoimmune Diseases Selecta Biosciences, Inc., a biopharmaceutical company developing a new class of synthetic vaccines and immunotherapies, today announced that it has initiated a Phase 1 clinical trial to assess ...

Nanoparticle electrode for batteries could make large-scale power storage on the energy grid feasible, say Stanford researchers

Nov. 2011- The sun doesn't always shine and the breeze doesn't always blow and therein lie perhaps the biggest hurdles to making wind and solar power usable on a grand scale.  If only there were an efficient, durable, high-power, rechargeable battery we could use to store large quantities of excess power generated on windy or sunny days until we needed it. And as long as we're fantasizing, ...

Stabilized Nanostructure Composites for Nonvolatile Memory Device Applications

Sep. 2011- New approaches to nonvolatile memory devices have previously been demonstrated by charge trapping on metallic nanoparticles (NPs) embedded in organic layers. Devices based on this concept have shown that the memory capability of the device is affected by the distribution of the NPs. In the case of gold nanoparticles (AuNPs) that are frequently embedded in the organic layer or on the surface, ...

Solution-based Fabrication of Quantum Dot Light-emitting Diodes

Sep. 2011- Multilayer light emitting diode (LED) structures incorporating quantum-dot (QD) active layers have shown promise for lighting and display applications resulting from the efficient, narrow-band light emission provided by QD’s, along with the ability to tune emission wavelength through control of QD size. A limitation of QD-based LEDs has been the choice of materials used to facilitate the ...

UGA researchers use gold nanoparticles to diagnose flu in minutes

Aug. 2011- Arriving at a rapid and accurate diagnosis is critical during flu outbreaks, but until now, physicians and public health officials have had to choose between a highly accurate yet time-consuming test or a rapid but error-prone test.A new detection method developed at the University of Georgia and detailed in the August edition of the journal Analyst, however, offers the best of both worlds. By ...

Informing Selection of Nanomaterial Concentrations for ToxCast In Vitro Testing based on Occupational Exposure Potential

Aug. 2011- "Informing Selection of Nanomaterial Concentrations for ToxCast In Vitro Testing based on Occupational Exposure Potential" is now available through the InterNano Nanomanufacturing Library. The full article is available here. Abstract Background: Little justification is generally provided for selection of in vitro assay testing concentrations for engineered nanomaterials (ENMs). ...

LGC Standards Offers World’s First Certified Reference Nanomaterial

Mar. 2011- The world's first certified nanoparticle reference material set to improve comparability of measurements worldwide. LGC Standards is pleased to announce its range of reference nanomaterials has been enhanced by the addition of the world’s first certified reference material based on industry-sourced nanoparticles. Developed by the European Commission’s Joint Research Centre, the ...

Microfluidic, Label-free, High-throughput Nanoparticle Analyzer

Mar. 2011- Currently, the most common methods for sizing nanoparticles extract data from bulk measurements. These techniques are inherently averaging and so are unable to effectively resolve mixtures of different-sized particles. While individual nanoparticles can be sized using electron microscopy, this approach is time-consuming and of little utility in assembling significant population statistics. ...

Harmless Natural Nanoparticles Show Potential to Replace Metal-based Nanoparticles in Sunscreen

Jul. 2010- Quite a lot of nanotechnology research and manufacturing efforts go into synthesizing metal-based nanoparticles. Unfortunately, some of the nanoparticle manufacturing processes themselves (see: "Not so 'green' nanotechnology manufacturing") as well as the final nanoparticle materials may be of potential concern for environmental regulators and for researchers attempting to ...

Nanostructured Solar Cells Have Improved Charge Collection and Self Cleaning Properties

Feb. 2010- Zhu, et. al., report on the use of “nanodome” solar cells to simultaneously improve optical absorption and enhance surface cleanliness. The resulting structures have power conversion efficiencies of 5.9%.

Researchers to Study Silica Nanoparticles for Advanced Biofuels

Jan. 2010- Two teams of Iowa State University researchers will receive a total of $8 million over three years from a $78 million U.S. Department of Energy program to research and develop advanced biofuels. Victor Lin - professor of chemistry, director of the Institute for Physical Research and Technology's Center for Catalysis at Iowa State, program director for Chemical and Biological ...

Controlled Deposition of Microparticle Arrays for LEDs

Dec. 2009- Kumnorkaew and Gilchrist report on the use of the “coffee stain” effect to simultaneously deposit controlled arrays of  microparticles embedded in nanoparticles.  These structures can dramatically improve the output coupling of III-Nitride LEDs.

Working Group Makes Important Contribution to EPA’s Scientific Advisory Panel on Nanosilver

Dec. 2009- On November 3 – 6, 2009 the US Environmental Protection Agency (EPA) held a Scientific Advisory Panel (SAP) meeting in Arlington, Virginia to discuss the “Evaluation of Hazard and Exposure Associated with Nanosilver and Other Nanometal Oxide Pesticide Products.”[1]  The meeting was well attended. Over seventy-five people from industry, regulatory, public interest, and ...

Pitt Team Conquers Hurdle to Nano Devices With First Metallic Nanoparticles Resistant to Extreme Heat

Dec. 2009- A University of Pittsburgh team overcame a major hurdle plaguing the development of nanomaterials such as those that could lead to more efficient catalysts used to produce hydrogen and render car exhaust less toxic. The researchers reported Nov. 29 in “Nature Materials” the first demonstration of high-temperature stability in metallic nanoparticles, the vaunted next-generation ...

Study of Chinese Print Workers Claims to Provide the First Human Evidence of the Clinical Toxicity of Long-term Nanoparticle Exposures

Oct. 2009- A recent study published in the well-known medical journal, the European Respiratory Journal, has been receiving significant publicity as the authors have claimed their findings support an apparent linkage between workplace exposures to nanoparticles and severe respiratory disease.  Specifically, in this study, investigators at China's Capital University of Medical Science related ...

NCSU Engineers Produce "How-To" Guide for Controlling the Structure of Nanoparticles

Sep. 2009- Researchers from North Carolina State University have learned how to consistently create hollow, solid and amorphous nanoparticles of nickel phosphide, which has potential uses in the development of solar cells and as catalysts for removing sulfur from fuel. Their work can now serve as a “how-to” guide for other researchers to controllably create hollow, solid and amorphous ...

Sourcelist on Chinese Worker Exposure to Nanoparticle Study

Aug. 2009- The publication in the European Respiratory Journal of a study by Y. Song and colleagues of Capital University of Medical  Sciences in Beijing China that links nanoparticles with lung disease and the deaths of two factory workers has received a spate of quick responses from the scientific community. Below is a chronological compilation of resources and reactions to the work.

Self-assembling Nanobridges From the University of Twente

Jun. 2009- Press Release: Researchers of the MESA+ Institute for Nanotechnology at the University of Twente have for the first time succeeded in building self-assembling bridges of nanoparticles. Their results are published in the 19 June edition of Small.

Cytotoxicity and Genotoxicity of Silver Nanoparticles in Human Cells

Apr. 2009- This study proposes the mechanism of toxicity of starch coated silver nanoparticles in human lung and brain tumor cells is through disruption of the mitochondria, the main source of energy for the cell.  Starch was previously shown to make the nanoparticle soluble in water and to protect the nanoparticles from “clumping” in the water or within the cells. An exposure to nanosilver ...

A New Approach to Hierarchical Self-Assembly

Feb. 2009- National Nanomanufacturing Network: Chemists from the University of Massachusetts Amherst, with Material Scientists from Duke, report a new approach to forming complex nanoparticle superstructures. The research was published in the February 19 issue of Nature.

Large Scale Methodology for Preparation of Carbon Supported Metallic Nanoparticles

Jan. 2009- Silver and other metallic nanoparticles are of significant research interest due to their intriguing properties for applications in optoelectronics, catalysts and fuel cells, and antimicrobial surfaces. Wang, et. al., offer a scalable approach to forming supported metallic nanoparticle compositions through a straightforward manufacturing process. 

A new chemical route to synthesize Cu-Ni alloy nanostructured particles

Nov. 2008- Cangiano et. al. demonstrate the viability of producing Cu–Ni alloy nanoparticles of homogeneous composition via a four-step, citrate-gel process with significantly reduced reaction temperatures.  

A Simple Method for Forming Hybrid Core-Shell Nanoparticles Suspended in Water

Sep. 2008- Jean-Christophe Daigle and Jerome P. Claverie report a method for fabricating materials composed of inorganic nanoparticles encased in organic polymer shells.   

Nanoparticle Characteristics Affecting Uptake by Cells

Sep. 2008- University of North Carolina Chapel Hill and North Carolina State University: Researchers at UNC-CH and NCSU have shown the importance of nanoparticle size, shape and surface chemistry on uptake by living cells.

Nanoparticle Synthesis: Reduced Agglomeration through Electric-Field Enhanced Flame Synthesis

Sep. 2008- Reporting in Journal of Nanoparticle Research, Zhao and colleagues describe a technique to model charged species behavior by electrostatic manipulation that provides additional time/temperature histories beyond flow transport measurements.  

Advances in Aerosol Processing Furthering the Utilization of Aerosols in Nanomanufacturing

Sep. 2008- In a recent research review paper, Professor Steven Girshick from the University of Minnesota details several advances in aerosol processing that can further the utilization of aerosols in nanomanufacturing. 

Lower-Energy Treatment of Air Contamination using Gold Nanoparticles

Sep. 2008- Researchers from Queensland University of Technology in Brisbane, Australia; Nankai University in Tianjin, China; and The Chinese Academy of Science in Beijing, China have discovered that gold nanoparticles can be used as catalysts at ambient temperatures in light-driven oxidation of volatile organic compounds (VOCs). 

Tutorial Review on Self-Assembly of Gold Nanoparticles by CHM Researchers

Sep. 2008- National Nanomanufacturing Network: A special Chemical Society Reviews theme issue on gold chemistry features the work of researchers at the Center for Hierarchical Manufacturing.

Moving Forward: An Interview with Vince Rotello

Sep. 2008- While research into the properties of various nanostructured materials has received a good deal of press for many years now, recent research focuses on the controlled manipulation of these nanostructures. Vincent Rotello, Charles A. Gossemann Professor of Chemistry at the University of Massachusetts Amherst, is making a significant contribution to this body of knowledge. 

Moving Forward: An Interview with Vince Rotello

Sep. 2008- While research into the properties of various nanostructured materials has received a good deal of press for many years now, recent research focuses on the controlled manipulation of these nanostructures. Vincent Rotello, Charles A. Gossemann Professor of Chemistry at the University of Massachusetts Amherst, is making a significant contribution to this body of knowledge. 

Scalable process to form magnetic nanoparticles with immobilized enzymes

Aug. 2008- University of Idaho: Researchers from the University of Idaho have developed a novel scalable technique to produce magnetic nanoparticles containing immobilized enzymes for eventual use in applications such as pharmaceutical production and environmental remediation. 

Exposure to Diesel Exhaust Induces Changes in EEG in Human Volunteers

Apr. 2008- This study examines changes in brain activity, particularly in the frontal cortex, that result from exposure to diesel exhaust (DE), which is a mixture of non-engineered nanoparticles and exhaust compounds.  Further human studies are necessary to determine whether nanoparticles in DE are responsible for these effects and if so, by what mechanism.  

Considerations on Occupational Medical Surveillance in Employees Handling Nanoparticles

Nov. 2007- The authors discuss the appropriateness of establishing occupational medical surveillance programs for workers handling nanomaterials. Because there is no information yet available on health outcomes that may be associated with exposure to nanoparticles, the authors suggest general medical screening, baseline examinations, and establishment of exposure registries to document who is currently ...

Persistent Tissue Kinetics and Redistribution of Nanoparticles, Quantum Dot 705, in Mice

Sep. 2007- The findings from this study indicate that following intravenous injection in mice, quantum dots may localize in important organs such as the kidney or liver, and they have a very long biological half-life. Such observations are important, given the potential for the use of quantum dots for biological imaging purposes in humans. 

Assessing Toxicity of Fine and Nanoparticles

Sep. 2007- This study indicates that the observed in vitro effects of nanoparticles are not necessarily predictive of in vivo pulmonary effects.  In vitro assays will need to be standardized and validated relative to in vivo effects before they can provide useful screening data on the relative toxicity of inhaled nanoparticles. 

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A Simple Method for Forming Hybrid Core-Shell Nanoparticles Suspended in Water

Core-shell hybrid nanoparticles, where the core is an inorganic nanoparticle and the shell an organic polymer, are prepared by a two-step method. Inorganic nanoparticles are first dispersed in water using poly(acrylic acid) (PAA) prepared by reversible addition fragmentation chain transfer (RAFT) polymerization as dispersant. Then, the resulting dispersion is engaged in a radical emulsion ...

Aerosol Processing for Nanomanufacturing

Advances in nanoparticle synthesis are opening new opportunities for a broad variety of technologies that exploit the special properties of matter at the nanoscale. To realize this potential will require the development of new technologies for processing nanoparticles, so as to utilize them in a manufacturing context. Two important classes of such processing technologies include the controlled ...

Applications of Nanoparticles in Biology

The wide variety of core materials available, coupled with tunable surface properties, make nanoparticles an excellent platform for a broad range of biological and biomedical applications. This Review provides an introduction to nanoparticle-biomolecular interactions as well as recent applications of nanoparticles in biological sensing, delivery, and imaging of live cells and tissues.

Carbon Nanotube Thin Film TransistorsReady for Prime Time?

Recent efforts to synthesize carbon nanotube networks in a transistor integration strategy have shown significant promise as an alternative technology for large area TFT applications. With new knowledge of necessary process control mechanisms and carbon nanotube network properties, these approaches use solution-based assembly techniques to achieve specific device parameters by design and have ...

Centrifugal Sedimentation for Selectively Packing Channels with Silica Microbeads in Three-Dimensional Micro/Nanofluidic Devices

Incorporation of nanofluidic elements into microfluidic channels is one approach for adding filtration and partition functionality to planar microfluidic devices, as well as providing enhanced biomolecular separations. Here we introduce a strategy to pack microfluidic channels with silica nanoparticles and microbeads, thereby indirectly producing functional nanostructures; the method allows ...

Challenges for Sustaining Leadership in Nanotechnology in the U.S.

the NNI investment has met its intended goals and objectives, including U.S. leadership in fundamental research in nanotechnology and economic impact in the form of job creation and establishment of new industries. While the latter is difficult to assess directly since many nanotechnology related jobs exist within established industries that have naturally evolved into nanotechnology R&D, ...

Charge Dependence of Ligand Release and Monolayer Stability of Gold Nanoparticles by Biogenic Thiols

The effect of surface charge on the stability of gold nanoparticles (AuNPs) to the biogenic thiols glutathione (GSH), dihydrolipoic acid (DHLA), and cysteine was quantified. It was observed that the rate of release of fluorescein-tagged ligand was determined by the surface charge of the AuNPs, with cationic particles much more labile than anionic analogues. This ability to tune stability is ...

Colloidal Stability of Magnetic Iron Oxide Nanoparticles: Influence of Natural Organic Matter and Synthetic Polyelectrolytes

The colloidal behavior of natural organic matter (NOM) and synthetic poly(acrylic acid) (PAA)-coated ferrimagnetic (gamma Fe(2)O(3)) nanoparticles (NPs) was investigated. Humic acid (HA), an important component of NOM, was extracted from a peat soil. Two different molecular weight PAAs were also used for coating. The colloidal stability of the coated magnetic NPs was evaluated as a resultant of ...

Colorimetric Bacteria Sensing Using a Supramolecular Enzyme-Nanoparticle Biosensor

Rapid and sensitive detection of pathogens is a key requirement for both environmental and clinical settings. We report here a colorimetric enzyme nanoparticle conjugate system for detection of microbial contamination. In this approach, cationic gold nanoparticles (NPs) featuring quaternary amine headgroups are electrostatically bound to an enzyme [beta-galactosidase (beta-Gap], inhibiting enzyme ...

Congressional Subcommittee Explores Impact and Economic Benefits of National Nanotechnology Initiative

This month, the House Science, Space, and Technology Subcommittee on Research and Science Education held a hearing, entitled "Nanotechnology: Oversight of the National Nanotechnology Initiative and Priorities for the Future", to assess the impact of the federal government's investment in the National Nanotechnology Initiative (NNI). In doing so the subcommittee heard key testimony from industry ...

Considerations on Occupational Medical Surveillance in Employees Handling Nanoparticles

The use of engineered nanoparticles not only offers new technical perspectives but also raises questions regarding possible health aspects for producers and users. Nanoparticles may, just by virtue of their size, exert biological effects unrelated to the chemicals they are composed of. These considerations, and results from experimental animal studies suggesting that engineered nanomaterials may ...

Control of nanoparticle size and agglomeration through electric-field-enhanced flame synthesis

The isolated study of electrophoretic transport of nanoparticles (that are innately charged through thermionic emission), with no ionic wind, has been conducted under uniform electric fields. Titania nanoparticles are produced using a burner-supported low-pressure premixed flame in a stagnation-point geometry from corresponding organometallic vapor precursor. The material processing flow field is ...

Controlled Aggregation of Colloidal Particles for Toner Applications

Micrometer-sized particles were formed by controlled aggregation of carboxylated polystyrene colloidal spheres having a mean diameter of about 200 nm with a commercial cationic coagulant. To identify the parameters governing the size and structure of the aggregates, the aggregate size distribution was studied over a period of time with dynamic light scattering. The effect of the particle ...

Controlled and Sustained Release of Drugs from Dendrimer-Nanoparticle Composite Films

A dendrimer-nanoparticle hybrid scaffold based on robust dithiocarbamate formation provides a controlled drug delivery system. These composite films are nontoxic and can incorporate a variety of guests, providing sustained drug release over multiple uses. The system is highly modular: the release process can be easily tuned by altering the dendrimer generation and the size of the AuNPs, ...

Cytotoxicity and Genotoxicity of Silver Nanoparticles in Human Cells

Silver nanoparticles (Ag-np) are being used increasingly in wound dressings, catheters, and various household products due to their antimicrobial activity. The toxicity of starch-coated silver nanoparticles was studied using normal human lung fibroblast cells (IMR-90) and human glioblastoma cells (U251). The toxicity was evaluated using changes in cell morphology, cell viability, metabolic ...

Deformation and Breakup of Micro- and Nanoparticle Stabilized Droplets in Microfluidic Extensional Flows

Using a microfluidic flow-focusing device, mono-disperse water droplets in oil were generated and their interface populated by either 1 mu m or 500 nm amine modified silica particles suspended in the water phase. The deformation and breakup of these Pickering droplets were studied in both pure extensional flow and combined extensional and shear flow at various capillary numbers using a ...

Detection and differentiation of normal, cancerous, and metastatic cells using nanoparticle-polymer sensor arrays

Rapid and effective differentiation between normal and cancer cells is an important challenge for the diagnosis and treatment of tumors. Here, we describe an array-based system for identification of normal and cancer cells based on a chemical nose/tongue approach that exploits subtle changes in the physicochemical nature of different cell surfaces. Their differential interactions with ...

Direct photopatterning of light-activated gold nanoparticles

Photoactivatable gold NPs were patterned via photolithography. In this approach, charge reversal of the ligands on NPs upon UV irradiation induces crosslinking to generate stable NP patterns.

Efficient Gene Delivery Vectors by Tuning the Surface Charge Density of Amino Acid-Functionalized Gold Nanoparticles

Gold colloids functionalized with amino acids provide a scaffold for effective DNA binding with subsequent condensation. Particles with lysine and lysine dendron functionality formed particularly compact complexes and provided highly efficient gene delivery without any observed cytotoxicity. Nanoparticles functionalized with first generation lysine dendrons (NP?LysG1) were 28-fold superior to ...

Encapsulated-Dye All-Organic Charged Colored Ink Nanoparticles for Electrophoretic Image Display

Electrophoretic ink nanoparticles with high mobility are successfully fabricated by dispersion polymerization. The color of test cells can be changed by applying a bias voltage, as shown in the figure: the lower row shows the same cells as the upper row but with an applied voltage. These all-organic, encapsulated-dye, electrophoretic ink particles are expected to reduce the fabrication cost of ...

Exposure to nanoscale particles and fibers during machining of hybrid advanced composites containing carbon nanotubes

This study investigated airborne exposures to nanoscale particles and fibers generated during dry and wet abrasive machining of two three-phase advanced composite systems containing carbon nanotubes (CNTs), micron-diameter continuous fibers (carbon or alumina), and thermoset polymer matrices. Exposures were evaluated with a suite of complementary instruments, including real-time particle number ...

Extensional rheology of shear-thickening nanoparticle suspensions

A filament-stretching rheometer is used to measure the extensional properties of shear-thickening nanoparticle suspensions as a function of concentration and extension rate. The experiments are performed using a series of colloidal suspensions consisting of concentrations of 17.5 wt%, 25 wt% and 30 wt% of fumed silica nanoparticles in polypropylene glycol. The shear rheology of these suspensions ...

Forming Stable Dispersions of Nanoparticles

Discrete and stable dispersions (solid particles in a liquid carrier) of nanoparticles are required for a wide range of applications. Pertinent examples include: (1) Titanium dioxide of 20 50nm used for UV absorbing properties in transparent varnishes, (2) Colloidal gold used to carry drugs through a biological barrier, (3) Quantum dots where the size of particle dictates the observed color. ...

Gold Nanoparticle Self-Similar Chain Structure Organized by DNA Origami

Here we demonstrate Au nanoparticle self-similar chain structure organized by triangle DNA origami with well-controlled orientation and

Gold nanoparticle-polymer/biopolymer complexes for protein sensing

Nanoparticle-based sensor arrays have been used to distinguish a wide range of biomolecular targets through pattern recognition. Such biosensors require selective receptors that generate a unique response pattern for each analyte. The tunable surface properties of gold nanoparticles make these systems excellent candidates for the recognition process. Likewise, the metallic core makes these ...

Gold nanoparticles in delivery applications

Gold nanoparticles (AuNPs) provide non-toxic carriers for drug and gene delivery applications. With these systems, the gold core imparts stability to the assembly, while the monolayer allows tuning of surface properties such as charge and hydrophobicity. An additional attractive feature of AuNPs is their interaction with thiols, providing an effective and selective means of controlled ...

Gold nanoparticles: preparation, properties, and applications in bionanotechnology

Gold nanoparticles (AuNPs) are important components for biomedical applications. AuNPs have been widely employed for diagnostics, and have seen increasing use in the area of therapeutics. In this mini-review, we present fabrication strategies for AuNPs and highlight a selection of recent applications of these materials in bionanotechnology.

Graphene-Supported Pt-Au Alloy Nanoparticles: A Highly Efficient Anode for Direct Formic Acid Fuel Cells

Graphene-supported Pt and Pt-Au alloy electrocatalysts are prepared by ethylene glycol reduction method and characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX). XRD reveals the face-centered cubic structure of Pt in the materials. SEM and TEM images show the good spatial distribution ...

Green Synthesis of Ag and Pd Nanospheres, Nanowires, and Nanorods Using Vitamin B2: Catalytic Polymerisation of Aniline and Pyrrole

For the first time, we report green chemistry approach using vitamin B2 in the synthesis of silver (Ag) and palladium (Pd), nanospheres, nanowires, and nanorods at room temperature without using any harmful reducing agents, such as sodium borohydride (NaBH4) or hydroxylamine hydrochloride and any special capping or dispersing agent. Vitamin B2 was used as reducing agent as well as capping agent ...

High-Performance Lithium-Ion Anodes Using a Hierarchical Bottom-Up Approach

Si-based Li-ion battery anodes have recently received great attention, as they offer specific capacity an order of magnitude beyond that of conventional graphite. The applications of this transformative technology require synthesis routes capable of producing safe and easy-to-handle anode particles with low volume changes and stable performance during battery operation. Herein, we report a ...

Informing Selection of Nanomaterial Concentrations for ToxCast In Vitro Testing based on Occupational Exposure Potential

Background: Little justification is generally provided for selection of in vitro assay testing concentrations for engineered nanomaterials (ENMs). Selection of concentration levels for hazard evaluation based on real-world exposure scenarios is desirable. Objectives: Our goal is to use estimates of lung deposition following occupational exposure to nanomaterials to recommend in vitro testing ...

Maskless Nanoscale Writing of Nanoparticle?Polymer Composites and Nanoparticle Assemblies using Thermal Nanoprobes

Nanoparticle polymer composites containing metal, semiconductor, magnetic, and optically active nanoparticles were deposited onto multiple substrates from a heatable atomic force microscope tip. The nanoparticle nanostructures were functional as deposited or could be etched with an oxygen plasma, revealing single nanoparticle lithographic resolution. Many types of nanoparticles can be patterned ...

Multiplexed Imaging of Nanoparticles in Tissues

To more fully understand the biodistributions and potential toxicity of nanoparticles (NPs) that are released into the environment, it is essential to monitor the spatial distributions of NPs in vivo. To this end CHM scientists have developed an approach based on laser desorption/ionization mass spectrometry (LDI-MS) to image NPs in tissues. Because MS is used as the readout for this imaging ...

Multiplexed Screening of Cellular Uptake of Gold Nanoparticles Using Laser Desorption/Ionization Mass Spectrometry

Gold nanoparticles (AuNPs) are highly promising candidates as drug delivery agents into cells of interest. We describe for the first time the multiplexed analysis of nanoparticle uptake by cells using mass spectrometry. We demonstrate that the cellular uptake of functionalized gold nanoparticles with cationic or neutral surface ligands can be readily determined using laser desorption/ionization ...

Nano Meets Biology: Structure and Function at the Nanoparticle Interface

Understanding the interactions of nanomaterials with biosystems is a critical goal in both biomedicine and environmental science. Engineered nanoparticles provide excellent tools for probing this interface. In this feature article, we will summarize one of the themes presented in our recent Langmuir lecture discussing the use of monolayer design to understand and control the interactions of ...

NanoPen: Dynamic, Low-Power, and Light-Actuated Patterning of Nanoparticles

We introduce NanoPen, a novel technique for low optical power intensity, flexible, real-time reconfigurable, and large-scale light-actuated patterning of single or multiple nanoparticles, such as metallic spherical nanocrystals, and one-dimensional nanostructures, such as carbon nanotubes. NanoPen is capable of dynamically patterning nanoparticles over an area of thousands of square micrometers ...

Nanoinformatics 2011 Supports Updated NNI EHS Research Strategy

The responsible development of nanotechnology has an impact across essentially all economic sectors, including advanced manufacturing. As core research areas of the recently released 2011 National Nanotechnology Initiative (NNI) Environmental Health and Safety (EHS) Research Strategy include a nanomaterials measurement infrastructure, as well as informatics and modeling, it has become evident ...

Nanomanufacturing Summit 2011 Provides Focus on Commercialization, Manufacturing Innovations, and Emerging Research

The Nanomanufacturing Summit 2011, held this past week in Boston, provided some high level discussions with focus on, amongst other topics, nanotechnology commercialization, translational research emerging from academic research centers, and manufacturing innovations. In the first event wherein the NNN has teamed with the NanoBusiness Commercialization Association, key topics also included ...

Nanomaterials in the Construction Industry: A Review of Their Applications and Environmental Health and Safety Considerations

The extraordinary chemical and physical properties of materials at the nanometer scale enable novel applications ranging from structural strength enhancement and energy conservation to antimicrobial properties and self-cleaning surfaces. Consequently, manufactured nanomaterials (MNMs) and nanocomposites are being considered for various uses in the construction and related infrastructure ...

Nanoparticle Exposure Assessment and Control

Our mission is to ensure all students and researchers are working safely with nanoparticles at the Center for High-rate Nanomanufacturing (CHN). We employed unique equipment to evaluate airborne nanoparticle exposures in CHN laboratories and Industry facilities. Furthermore, we develop best practices and engineering controls for nanoparticles applications.

Nanoparticle Immobilization on Surfaces via Activatable Heterobifunctional Dithiocarbamate Bond Formation

A simple and reliable technique has been developed to deposit robust monolayers of different types of nanoparticles including gold, iron-platinum, and core/shell CdSe/ZnS, using in situ dithiocarbamate formation.

Nanoparticle Stripes, Grids, and Ribbons Produced by Flow Coating

Multicomponent and robust structures of quantum dots, in the form of stripes and grids, are produced by a simple flow coating method giving unprecedented control over macroscopic architectures from nanoscopic components. Crosslinking and lift-off of stripes lead to free-floating structures of nanoparticles that are flexible, robust, and fluorescent.

Nanopatterning self-assembled nanoparticle superlattices by moulding microdroplets

Highly ordered arrays of nanoparticles exhibit many properties that are not found in their disordered counterparts. However, these nanoparticle superlattices usually form in a far-from-equilibrium dewetting process, which precludes the use of conventional patterning methods owing to a lack of control over the local dewetting dynamics. Here, we report a simple yet efficient approach for patterning ...

Nanostructured Sensors for Homeland Security Applications

An important beneficiary of emerging nanomanufacturing techniques has been in the area of detection and sensing for homeland security and defense applications. Also: Organic Electrophoretic Inks Utilizing Encapsulated-Dye Nanoparticles; NIEHS Call for Applications to Study ENM Interactions with Biological Processes; and NNN Welcomes Hyung Gyu Park, J. Alexander Liddle to Editorial team.

On the Complexity of Electrostatic Suspension Stabilization of Functionalized Silica Nanoparticles for Biotargeting and Imaging Applications

Different means of attaching streptavidin to surface functionalized silica particles with a diameter of 240?nm were investigated with special focus on suspension stability for electrostatically stabilized suspensions. The influence of two different fluorescent dyes covalently linked to the streptavidin on suspension stability was also studied. The results clearly show that the stability of the ...

One-pot synthesis of hybrid TiO(2)-polyaniline nanoparticles by self-catalyzed hydroamination and oxidative polymerization from TiO(2)-methacrylic acid nanoparticles

A simple self-catalyzed hydroamination method for creating hybrid TiO(2)-polyaniline core-shell nanoparticles (NP) has been shown. Hybrid NPs with a range of possible sizes are afforded in high yield under mild reaction conditions and simultaneously show improved charge transport and electrochromic behavior compared to either polyaniline alone or physically blended with TiO(2).

Persistent Tissue Kinetics and Redistribution of Nanoparticles, Quantum Dot 705, in Mice: ICP-MS Quantitative Assessment

Background: Quantum dots (QDs) are autofluorescent semiconductor nanocrystals that can be used for in vivo biomedical imaging. However, we know little about their in vivo disposition and health consequences. Objectives: We assessed the tissue disposition and pharmacokinetics of QD705 in mice. Methods: We determined quantitatively the blood and tissue kinetics of QD705 in mice after single ...

Protein-passivated Fe3O4 nanoparticles: low toxicity and rapid heating for thermal therapy

Thermotherapy is a promising technique for the minimally invasive elimination of solid tumors. Here we report the fabrication of protein-coated iron oxide NPs (12 nm core) for use as thermal therapeutic agents. These albumin-passivated NPs are stable under physiological conditions, with rapid heating and cell killing capacity upon alternating magnetic field (AMF) exposure. The mode of action is ...

Raman Enhancement Factor of a Single Tunable Nanoplasmonic Resonator

We have developed a novel technique to precisely determine the Raman enhancement factor in single nanoplasmonic resonators (TNPRs). TNPRs are lithographically defined metallodielectric nanoparticles composed of two silver disks stacked vertically, separated by a silica layer. At resonance, the local electromagnetic fields are enhanced at the TNPR surface, making it an ideal surface-enhanced Raman ...

Resonant and non-resonant generation and focusing of surface plasmons with circular gratings

We report the generation and focusing of surface plasmon polariton (SPP) waves from normally incident light on a planar circular grating milled into a silver film. The focusing mechanism is explained by using a simple coherent interference model of SPP generation on the circular grating by the incident field. Experimental results concur well with theoretical predictions and highlight the ...

Self-Assembly and Cross-linking of FePt Nanoparticles at Planar and Colloidal Liquid?Liquid Interfaces

Terpyridine thiol functionalized FePt and Au NPs were self-assembled and cross-linked at the liquid?liquid interfaces using Fe(II) metal ion. Complexation of terpyridine with Fe(II) metal ion leads to NP network and affords stable membranes and colloidal shells at the liquid?liquid interfaces.

Stability of quantum dots in live cells

Quantum dots are highly fluorescent and photostable, making them excellent tools for imaging. When using these quantum dots in cells and animals, however, intracellular biothiols (such as glutathione and cysteine) can degrade the quantum dot monolayer, compromising function. Here, we describe a label-free method to quantify the intracellular stability of monolayers on quantum dot surfaces that ...

Stable Magnetic Colloidosomes via Click-Mediated Crosslinking of Nanoparticles at Water-Oil Interfaces

Alkyne- and azide-functionalized iron oxide nanoparticles are co-assembled at the water-oil interface and covalently linked using click chemistry under ambient conditions to create magnetic colloidosomes (see image). These colloidosomes possess high stability, size-selective permeability, and are responsive toward external magnetic stimuli.

Structures of Binary C60?C84 Fullerene Clusters

A systematic study of the potential energy global minimum (GM) structures of model binary fullerene clusters of compositions (C-60)n(C-84)(N-n), N 18.

Super-Resolution Imaging by Random Adsorbed Molecule Probes

Single molecule localization (SML) is a powerful tool to measure the position and trajectory of molecules in numerous systems, with nanometer accuracy. This technique has been recently utilized to overcome the diffraction limit in optical imaging. So far, super-resolution imaging by SML was demonstrated using photoactivable or photoswitchable fluorophores, as well as diffusive fluorophore probes ...

Synergistic Effects of Mutations and Nanoparticle Templating in the Self-Assembly of Cowpea Chlorotic Mottle Virus Capsids

A study of the in vitro nanoparticle-templated assembly of a mutant of cowpea chlorotic mottle virus lacking most of the N-terminal domain (residues 4?37), N?34, is presented. Mutant empty proteins assemble into empty capsids with a much broader distribution of sizes than the wild-type virus. This increased flexibility in the assembly outcomes is known to be detrimental for the assembly process ...

Synthesis of Polyfluorenes with Pendant Silylcarboranes

The synthesis of a novel silylcarborane-containing fluorene monomer is reported in the present paper. Homo- and copolymerization via microwave-assisted Ni(0)-medialed coupling are described, and the influence of sterically crowded silylcarboranes on the polymerization outcome is assessed. The fluorescence spectra and thermal characteristics of the resulting polymers are analyzed and compared to ...

Synthesis, Structural and Magnetic Properties of Ni-Doped In(2)O(3) Nanoparticles

Pure and Ni-doped In(2-x)Ni(x)O(3) (x = 0.0, 0.01, 0.05, 0.1) nanocrystalline powders were synthesized using sol-gel process. The XRD patterns revealed the formation of nanocrystalline particles with cubic bixbyte crystal structure. The average crystal size was calculated from XRD patterns using Debye-Scherer's Equation for (222) peak and it was found to be 8 nm. This observation agrees well with ...

The AlmeidaThouless line in BiFeO3: is bismuth ferrite a mean field spin glass?

Low-temperature magnetic properties of epitaxial BiFeO3 (BFO) thin films grown on (111) SrTiO3 substrates have been studied. Zero-field-cooled and field-cooled magnetization curves show a large discrepancy beginning at a characteristic temperature Tf that is dependent on the magnetic field strength. Tf(H) varies according to the well known de AlmeidaThouless line Tf propto H2/3 suggesting an ...

The coalescence of supported gold nanoparticles induced by nanosecond laser irradiation

Gold nanoparticles supported on a quartz substrate are fabricated by e-beam lithography and subjected to nanosecond laser irradiation to induce coalescence. In combination with ex-situ scanning electron microscopy and optical extinction spectra, transmission is monitored in-situ to determine the characteristic coalescence time, the threshold fluence for the onset of coalescence and the produced ...

The preparation of reusable magnetic and photocatalytic composite nanofibers by electrospinning and atomic layer deposition

A versatile synthesis procedure for composite nanofibers, combining electrospinning and atomic layer deposition (ALD), is presented. Both solid core/sheath nanofibers and nanoparticle loaded nanotubes can be made, depending on the order of calcination of the electrospun fiber and the ALD process. Magnetic and photocatalytic nanofibers prepared this way can be recycled readily by collecting with a ...

Tunable and augmented plasmon resonances of Au?SiO[sub 2]?Au nanodisks

The plasmon resonance of Au/SiO2 multilayered nanodisks was studied using light scattering spectroscopy and numerical calculations. Compared to single layered Au nanodisks, multilayered nanodisks exhibit several distinctive properties including significantly enhanced plasmon resonances and tunable resonance wavelengths which can be tailored to desired values by simply varying dielectric layer ...

Why a Prevention-Based Approach to Managing the Risks of Engineered Nanomaterials Makes Sense and How To Get There

The existing toxicology literature on ultrafine particles and engineered nanomaterials suggest that nanomaterials may pose a threat to human health and the environment. A major challenge for the companies that produce and use these materials and for regulatory agencies is the issue of how to manage the risks of these materials while simultaneously leveraging the technological advantages that ...

Organizations

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Aphios Corp.

Aphios Corp.

Aphios is developing enabling technology platforms and enhanced therapeutics for health maintenance, disease prevention and the treatment of certain infectious diseases, cancers and CNS disorders.

Applied Plasmonics, Inc.

Applied Plasmonics, Inc.

Applied Plasmonics, a fabless semiconductor company, has invented a practical, mass-market use for devices based on surface plasmons. The new technology employs nano-antennas manufactured in a single layer to generate visible light. Our mission is to create selected, innovative, products that exploit surface plasmons. We develop intellectual property that enables the design, development, ...

CMI Enterprises

CMI Enterprises

We’re located in Miami, Fl with a second state of the art manufacturing plant in Elkhart, Indiana. Our distribution facilities in Arlington, Texas, and Los Angeles, California, are strategically positioned to serve all of our customers in a timely and satisfied manner. Another critical component of our business and marketing model is to develop long term "partnerships' with our customers. ...

Elmarco, Inc. and Elmarco s r o

Elmarco, Inc. and Elmarco s r o

Elmarco is the industry’s first supplier of industrial scale nanofiber production equipment. Our partnerships with global industrial leaders and universities form the foundation for our success. Elmarco’s Nanospider™ technology allows nanofibers to be produced on an industrial scale for a number of applications. Supported by a broad patent suite, Nanospider™ is a high voltage ...

HyperSolar, Inc.

HyperSolar, Inc.

HyperSolar is developing a breakthrough technology to produce renewable natural gas using sunlight, water and carbon dioxide. This renewable natural gas is a clean, carbon neutral methane gas that can be used as a direct replacement for traditional natural gas to power the world, without drilling or fracking, while mitigating CO2 emissions. Inspired by the photosynthetic processes that ...

Izon Science Ltd

Izon Science Ltd

Izon has developed accurate instrumentation for nanoscale particle analysis. The instrument systems, the qNano and qViro, are now in use in a wide range of research institutes and universities around the world. The basis of Izon’s instrumentation is a unique, dynamically tunable nanopore technology platform which utilises a technology called SIOS (Scanning Ion Occlusion Sensing). This ...

LumiSands, Inc

LumiSands, Inc

University of Washington
Silicon Nano-materials Research & Development for Lighting Phosphors used in lighting and display solutions are mostly derived from rare-earth elements (REEs), which is an environmental hazard to extract and process. Furthermore, persistently elevated prices since 2010 and IP restrictions on LED applications by major players have driven the lighting industry to ...

Nanoco Technologies Ltd

Nanoco Technologies Ltd

Nanoco partners major R&D and blue-chip industrial organisations in the development of applications incorporating semiconductor nanoparticles, "quantum dots". Nanoco is unique in the nanomaterials market as a company that manufacture large quantities of quantum dots. Our molecular seeding process for the bespoke manufacture of these quantum dots on a commercial scale is protected by ...

nanoComposix, Inc.

nanoComposix, Inc.

nanoComposix specializes in the fabrication, characterization, and integration of nanomaterials into products and systems. Our mission is to enable our customers to maximize the potential benefits of nanotechnology through the use of precisely engineered, highly characterized nanomaterials. Our multi-disciplinary technical teams provide method and protocol development, rapid prototyping, ...

Nanograde Llc.

Nanograde Llc.

Nanograde is the worldwide leader in the tailor-made development and production of nanoparticles and dispersions. Nanograde offers assistance in product or prototype development in the form of projects where Nanograde's partners can benefit from the extensive know-how in nanoparticle applications. Nanograde products are perfectly suited for coating or thin film applications and can be ...

Nanohybrids LLC

Nanohybrids LLC

NanoHybrids develops nanoparticle contrast agents for Photoacoustics, Optical Imaging, Microscopy, Molecular Diagnostic and Theranostic applications. As nanotechnology rapidly expands into the realms of medicine, there is an unmet need for “smart” nanoparticles capable of homing in on diseased tissue while leaving healthy cells intact. When targeted to specific biomarkers, these ...

NanoLab, Inc.

NanoLab, Inc.

Nanolab, Inc is a private company categorized under Carbon Specialties for Electrical Use. We manufacture carbon nanotubes and develop nanoscale devices. NanoLab was founded in January 2000. The company is headquartered in Waltham, Massachusetts (was in Newton, Massachusetts).

Nanopartz

Nanopartz

Nanopartz is a division of Concurrent Analytical Inc. The purpose of Concurrent Analytical Inc. is to commercialize the Ramanprobes technology to revolutionize point of care diagnostics. Nanopartz commercializes gold nanoparticles, particularly gold nanorods, for the research market. Specifically, the mission of Nanopartz is to commercialize therapeutic, imaging, and materials ...

NanoSight

NanoSight

NanoSight delivers the world’s most versatile and proven multi-parameter nanoparticle analysis in a single instrument. NanoSight visualizes, measures and characterizes virtually all nanoparticles. Particle size, concentration, zeta potential and aggregation can all be analyzed while a fluorescence mode provides speciation of labeled particles. NanoSight provides real time monitoring of ...

Nanosphere, Inc.

Nanosphere, Inc.

Nanosphere, Inc. is a nanotechnology-based healthcare company, offering proprietary breakthrough technologies that provide a unique and powerful solution to greatly simplify diagnostic testing. Nanosphere was founded in the year 2000 based upon nanotechnology discoveries at Northwestern University in Evanston, Illinois by Dr. Robert Letsinger and Dr. Chad Mirkin. Among other achievements, ...

NanoTech Egypt

NanoTech Egypt

NanoTech Egypt sells different nanomaterials of different sizes and shapes, dispersion of nanomaterials in any type of polymer such as PVP, PVA, PEG, PMMA, and Conducting polymer, .... etc. NanoTech Egypt does not only produce nanomaterials but also offer consulting, continuous advising and training to our customers on the uses and applications of our nanocomposites. NanoTech Egypt can ...

PChem Associates, Inc.

PChem Associates, Inc.

PChem’s technology includes novel materials (inks), print processing trade secrets, and know how that in total provide PChem with a competitive advantage in the exciting and rapidly growing printed electronics market space. The heart of PChem’s technology is the Company’s patented silver nanoparticles. The conductive inks derived from these uniquely stabilized silver nanoparticles enables ...

Technology Integration and Advanced Nano/microsystems Lab

Technology Integration and Advanced Nano/microsystems Lab

University of Minnesota
TIAN laboratory is currently focused on Micro/Nano Electro Mechanical Systems (MEMS/NEMS). Long-term research aims to investigate the fundamental electrical and mechanical principles of new materials for MEMS/NEMS and low-cost micro/nanomanufacturing approaches, utilizing nanotechnology (“bottom-up” nanomanufaturing techniques, nanomaterials, etc.) to effectively ...

Individuals

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Vince Rotello

Vince Rotello

Department of Chemistry
University of Massachusetts Amherst

Xiaomu Wu

Xiaomu Wu

Department of Chemistry
Columbia University

Li Han

Li Han

Center for Aerosol Technology
RTI International

Michele Ostraat

Michele Ostraat

Center for Aerosol Technology
RTI International

James Krajewski

James Krajewski

Engineering Research and Technology
DuPont

Lingyan Wang

Lingyan Wang

NSC Technology

Mehlika Ayla Kiser

Mehlika Ayla Kiser

Department of Chemistry
University of Oregon

Processes

Phosphine-stabilized gold nanoparticles

Phosphine-stabilized gold nanoparticles

Phosphine-stabilized gold nanoparticles have a rich chemistry and are excellent building blocks for functional groups, however they have typically been synthesized through cumbersome and unsafe methods. This process is a safer, more convenient, and more versatile procedure to synthesize small, phosphine-stabilized gold nanoparticles under ambient conditions.

Heat-controlled size evolution of dodecanethiol-protected Au nanoparticles in the solid state

Heat-controlled size evolution of dodecanethiol-protected Au nanoparticles in the solid state

A simple method to control the size of Au nanoparticles via heat treatment. The Au nanoparticles grew to between 3 and 10 nm in size at 150 to 250 degrees C.

Gallery Images

UV Stimulated Flourescence

UV Stimulated Flourescence

CdSe nanoparticles prepared via digestive ripening fluorescing under UV radiation.