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Content tagged with: Raman spectroscopy
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Improved High Frequency Performance and Scaling Effects of Graphene Transistors on Diamond-like Carbon

May. 2011- Graphene has attracted significant attention in recent years as a result of its high carrier mobility and saturation velocity, along with the ability to synthesize large-scale, high quality graphene sheets utilizing low-cost chemical vapor deposition (CVD) methods. Recently, Wu et.al. from IBM investigated the use of a diamond-like carbon (DLC) film grown on SiO2 as a substrate for transferring ...

Novel optical procedure greatly facilitates nanotube characterization

Sep. 2010- Single-walled carbon nanotubes (SWCNT) have been on the forefront of nanotechnological research for over a decade due to their outstanding and unique mechanical and electronic properties rendering this novel carbon allotrope an ideal candidate for a variety of electronic applications (see related spotlight articles, for example "A novel single electron pump based on a carbon ...

Nanostructured Sensors for Homeland Security Applications

Nov. 2009- An important beneficiary of emerging nanomanufacturing techniques has been in the area of detection and sensing for homeland security and defense applications. Examples of sensor technologies directly benefiting from nanostructured materials and processes include ultra-microelectrode arrays, which effectively increase the surface area of an electrochemical detection electrode by incorporation of ...

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Critical slowing down of spin fluctuations in BiFeO3

In earlier work we reported the discovery of phase transitions in BiFeO3 evidenced by divergences in the magnon light-scattering cross-sections at 140 and 201 K (Singh et al 2008 J. Phys.: Condens. Matter 20 252203) and fitted these intensity data to critical exponents ? = 0.06 and ?' = 0.10 (Scott et al 2008 J. Phys.: Condens. Matter 20 322203), under the assumption that the transitions are ...

Large-Area Dense Plasmonic Nanoarrays for Surface Enhanced Raman Applications

Despite the interesting fundamental science of SERS, the promise of the technique as the basis for portable chemical sensors has not been fully realized yet. The reason for this gap between the science and engineering lies in the formidable nanofabrication challenges, which can be summed up as the need to prepare large numbers of very small yet highly controlled hot spots for the sensing ...

One-magnon light scattering and spin-reorientation transition in epitaxial BiFeO3 thin films

Raman scattering from one-magnon excitation has been observed for the first time in epitaxial BiFeO3 thin films grown on (1 1 1) SrTiO3 substrates. The intensities and the frequency of the magnon mode at 18.9 cm?1 (M1) showed a discrepancy at the characteristic temperatures of not, vert, similar140 and 200 K and the magnon mode at 27.9 cm?1 (M2) disappeared at not, vert, similar200 K suggesting ...

Structural, electrical, and magnetic properties of chemical solution deposited Bi(Fe0.95Cr0.05)O-3 thin films on platinized silicon substrates

Polycrystalline BiFeO3 and Bi(Fe0.95Cr0.05)O3 thin films were deposited on Pt/TiO2/SiO2/Si substrates by chemical solution deposition. Their structural, electrical, and magnetic properties were measured and compared. The prominent splitting around 2theta~32 for the 104/110 reflections and the resemblance of Raman spectra with BiFeO3 suggests structural invariance upon Cr substitution (

Organizations

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Center for Nanoscale Science and Technology

Center for Nanoscale Science and Technology

National Institute of Standards and Technology
The NIST Center for Nanoscale Science and Technology (CNST) is a national user facility with a focus on commerce, supporting the U.S. nanotechnology enterprise from discovery to production by providing industry, academia, and other government agencies with access to world-class nanoscale measurement and fabrication methods and technology. The ...

First Nano, a division of CVD Equipment Corporation

First Nano, a division of CVD Equipment Corporation

First Nano manufactures turnkey thermal CVD & PECVD systems to meet the research & production needs in nanotechnology, solar, semiconductor and MEMS industries.

Graphene Laboratories, Inc.

Graphene Laboratories, Inc.

The primary goal of Graphene Laboratories, Inc., located in Calverton, NY, is to apply fundamental science and technology to bring functional graphene materials and devices to market. The company was founded by a group of experts in the field of nanomaterials, who possess extensive experience in the characterization of structural and electronic properties of graphene, as well as deep ...

Nano-C Inc

Nano-C Inc

At Nano-C's core is an energy and environmentally efficient combustion-based process technology invented at MIT by Nano-C Founder and MIT Professor Emeritus, Jack B. Howard. Nano-C is the exclusive developer and owner of the advanced II-G technology which has enabled Nano-C to be a leader in the efficient production of high-quality fullerenic materials including C60, C70, C84 and fullerene ...

Oregon Nanoscience and Microtechnologies Institute

Oregon Nanoscience and Microtechnologies Institute

Oregon Signature Research Center
ONAMI is Oregon’s first ‘Signature Research Center’ and a multi-level collaboration among Oregon’s research universities, Pacific Northwest National Laboratory and industry in the “Silicon Forest” high-tech cluster that is home to the world’s leading semiconductor, MEMS, nanotechnology tools and ...

PerkinElmer LAS Inc

PerkinElmer LAS Inc

At PerkinElmer, we design, manufacture and deliver advanced technology solutions that address the world's most critical health and safety concerns, including maternal and fetal health, clean water and air, and safe food and toys.

Thermo Scientific

Thermo Scientific

formerly Ahura Scientific
At Thermo Scientific, innovation is the big idea behind surprisingly microscopic results. With breakthrough research and state-of-the-art development, we create the smallest, most accurate technologies for handheld chemical identification, verification, and screening.

Individuals

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Ken Bosnick

Ken Bosnick

National Institute for Nanotechnology

Prof. Mark Andrews

Prof. Mark Andrews

Center for Self Assembled Chemical Structures; ArboraNano
McGill University

Angela R. Hight Walker

Angela R. Hight Walker

National Institute of Standards and Technology (NIST)

Jin Ho Kim

Jin Ho Kim

Brown University

Vuk Bartulovic

Vuk Bartulovic

Novacam Technologies Inc.
Optical and Surface Profilometers