Published articles Tiny Tiny RSS/1.9 2017-03-15T22:46:39+00:00 http://www.internano.org/reader/public.php?op=rss&id=-2&key=620352c1360941e29179168a2d4d0883cf551e01 http://www.nanowerk.com/nanotechnology-news/newsid=46757.php Graphene-nanotube hybrid boosts lithium metal batteries

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Scientists have created a rechargeable lithium metal battery with three times the capacity of commercial lithium-ion batteries by resolving something that has long stumped researchers: the dendrite problem.

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2017-05-18T18:48:06+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46753.php New water-based, recyclable membrane filters all types of nanoparticles

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Researchers have developed a new type of membrane that could extend the life of a separation system, lower its cost and, in some cases, increase its efficiency as well.

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2017-05-18T15:59:57+00:00 Nanowerk Nanotechnology News
http://feeds.lexblog.com/~r/NanoAndOtherEmergingChemicalTechnologiesBlog/~3/Pz9AgYj-6pw/ EPA Will Publish Draft Guidance for Reporting Nanoscale Materials for Comment The U.S. Environmental Protection Agency (EPA) is scheduled to publish a Federal Register notice on May 16, 2017, announcing the availability of and requesting public comment on a draft guidance document entitled “Guidance on EPA’s Section 8(a) Information Gathering Rule on Nanomaterials in Commerce.”  EPA states in the pre-publication notice that the guidance provides answers to questions EPA has received from manufacturers (includes importers) and processors of certain chemical substances when they are manufactured or processed at the nanoscale as described in the January 12, 2017, final rule.  The final rule involves one-time reporting for existing discrete forms of certain nanoscale materials, and a standing one-time reporting requirement for new discrete forms of certain nanoscale materials.  The notice lists the following North American Industrial Classification System (NAICS) codes to help readers determine whether the document may apply to them:

  • Chemical Manufacturing or Processing (NAICS Code 325);
  • Synthetic Dye and Pigment Manufacturing (NAICS Code 325130);
  • Other Basic Inorganic Chemical Manufacturing (NAICS Code 325180);
  • Rolled Steel Shape Manufacturing (NAICS Code 331221);
  • Semiconductor and Related Device Manufacturing (NAICS Code 334413);
  • Carbon and Graphite Product Manufacturing (NAICS Code 335991);
  • Home Furnishing Merchant Wholesalers (NAICS Code 423220);
  • Roofing, Sliding, and Insulation Material Merchant Wholesalers (NAICS Code 423330); and
  • Metal Service Centers and Other Metal Merchant Wholesalers (NAICS Code 423510).

EPA states that it will make the draft guidance available on its website at https://www.epa.gov/reviewing-new-chemicals-under-toxic-substances-control-act-tsca/control-nanoscale-materials-under#guidance, and will also be available in Docket ID number EPA-HQ-OPPT-2010-0572.  EPA states that it will accept comments regarding the guidance, but not regarding the rule itself, “which has already been finalized.”  Comments will be due 30 days after the notice is published in the Federal Register.  More information regarding the final rule is available in our January 12, 2017, memorandum, “EPA Promulgates Final TSCA Reporting and Recordkeeping Rule for Nanoscale Materials

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The U.S. Environmental Protection Agency (EPA) is scheduled to publish a Federal Register notice on May 16, 2017, announcing the availability of and requesting public comment on a draft guidance document entitled “Guidance on EPA’s Section 8(a) Information Gathering Rule on Nanomaterials in Commerce.”  EPA states in the pre-publication notice that the guidance provides answers to questions EPA has received from manufacturers (includes importers) and processors of certain chemical substances when they are manufactured or processed at the nanoscale as described in the January 12, 2017, final rule.  The final rule involves one-time reporting for existing discrete forms of certain nanoscale materials, and a standing one-time reporting requirement for new discrete forms of certain nanoscale materials.  The notice lists the following North American Industrial Classification System (NAICS) codes to help readers determine whether the document may apply to them:

  • Chemical Manufacturing or Processing (NAICS Code 325);
  • Synthetic Dye and Pigment Manufacturing (NAICS Code 325130);
  • Other Basic Inorganic Chemical Manufacturing (NAICS Code 325180);
  • Rolled Steel Shape Manufacturing (NAICS Code 331221);
  • Semiconductor and Related Device Manufacturing (NAICS Code 334413);
  • Carbon and Graphite Product Manufacturing (NAICS Code 335991);
  • Home Furnishing Merchant Wholesalers (NAICS Code 423220);
  • Roofing, Sliding, and Insulation Material Merchant Wholesalers (NAICS Code 423330); and
  • Metal Service Centers and Other Metal Merchant Wholesalers (NAICS Code 423510).

EPA states that it will make the draft guidance available on its website at https://www.epa.gov/reviewing-new-chemicals-under-toxic-substances-control-act-tsca/control-nanoscale-materials-under#guidance, and will also be available in Docket ID number EPA-HQ-OPPT-2010-0572.  EPA states that it will accept comments regarding the guidance, but not regarding the rule itself, “which has already been finalized.”  Comments will be due 30 days after the notice is published in the Federal Register.  More information regarding the final rule is available in our January 12, 2017, memorandum, “EPA Promulgates Final TSCA Reporting and Recordkeeping Rule for Nanoscale Materials

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2017-05-15T17:49:33+00:00 Lynn L. Bergeson and Carla N. Hutton Nano and Other Emerging Chemical Technologies Blog
http://www.nanowerk.com/nanotechnology-news/newsid=46703.php EPA nanotechnology information gathering rule extension and guidance

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EPA extends effective date of nanotechnology reporting and recordkeeping rule, seeks public input on draft guidance.

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2017-05-15T18:51:23+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46705.php Laser printing with nanoparticles holds promise for medical research

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In a new study, researchers suggest that a laser printing technique using nanoparticles could help unlock a more cost-effective approach to building sturdier and safer components.

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2017-05-15T19:06:19+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology_articles/newsid=46685.php A silver molecular ink platform formulated for screen, inkjet, and aerosol jet printing

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A simple formulation comprising silver neodecanoate, ethyl cellulose, and solvent provides improved performance versus that of established inks, yet with improved economics.

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2017-05-14T10:10:09+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46675.php A novel method for the synthesis of hexagonal boron nitride

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This synthesis of hBN in a controlled layer-by-layer fashion is critical to a number of applications, including tunneling barriers, used in transistors for low power devices, atomically thin capacitors, and two-dimensional transistors, which are smaller and use much less power than traditional silicon transistors.

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2017-05-12T11:30:18+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46710.php NSF awards $2.25M for Semiconductor and Nanotechnology Education Center

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Grant to expand credit-based high-tech learning opportunities, with an emphasis on providing skills to people from traditionally underserved communities.

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2017-05-16T06:27:50+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology_articles/newsid=46715.php Transparent tactile e-skin based on single-layer graphene

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Researchers present a promising approach toward the development of an energy-autonomous, flexible, and transparent tactile skin based on single-layer graphene integrated onto a photovoltaic cell.

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2017-05-16T09:44:00+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46718.php Oddball enzyme provides easy path to synthetic biomaterials

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Materials scientists have written the recipe on how to use an oddball enzyme to build new biomaterials out of DNA. The work provides instructions for researchers the world over to build self-assembling molecules for applications ranging from drug delivery to nanowires.

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2017-05-16T13:38:50+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46720.php A superior near-infrared organic light emitting diode

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Researchers have shown record external quantum efficiencies for diodes based on organic red/NIR oligomers free from heavy/toxic metals and combining electron-withdrawing (A) moieties together with electron-donating (D) ones, in a previously poorly studied A-D-A motif.

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2017-05-16T13:55:34+00:00 Nanowerk Nanotechnology News
http://www.rdmag.com/article/2017/01/dialing-wet-processing-parameters-mems-nano-manufacturing-and-r-d 'Dialing-In' Wet Processing Parameters for MEMS, Nano Manufacturing and R&D - R & D Magazine

R & D Magazine'Dialing-In' Wet Processing Parameters for MEMS, Nano Manufacturing and R&DR & D MagazineAs the market for nanotechnology (nano) and Micro-Electro-Mechanical Systems (MEMS) solutions continues to ramp up, the rate of organizations seeking to get involved with this sector is also burgeoning. Yet there are still significant challenges that ...

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2017-01-25T18:34:43+00:00 nanomanufacturing OR nanofabrication Google News
http://www.nanowerk.com/nanotechnology-news/newsid=46663.php Can crab shells provide a 'green' solution to malaria?

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Study shows how a mixture of chitin and silver nanoparticles inhibits growth of mosquito larvae.

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2017-05-11T13:19:31+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46604.php Discovery of new transparent thin film material could improve electronics and solar cells

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Conductivity is highest-ever for thin film oxide semiconductor material.

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2017-05-05T16:34:23+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46642.php Scientists print nanoscale imaging probe onto tip of optical fiber

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Combining speed with incredible precision, a team of researchers has developed a way to print a nanoscale imaging probe onto the tip of a glass fiber as thin as a human hair, accelerating the production of the promising new device from several per month to several per day.

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2017-05-10T08:17:11+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology_articles/newsid=46647.php The nanoFate model assesses the risk of engineered nanomaterials in the environment

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Scientists have developed a dynamic multimedia fate and transport model to predict the time-dependent accumulation of metallic engineered nanomaterials across environmental media. The model considers a wider range of processes and environmental subcompartments than most previous models.

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2017-05-10T13:31:40+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46652.php Avoiding printed 'coffee rings' with cellulose nanofibers

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Cellulose nanofibers can help particles in ink and printed electronics disperse evenly, rather than spread apart like dried coffee rings.

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2017-05-10T15:27:17+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46608.php Organic electronics: Semiconductors as decal stickers

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No more error-prone evaporation deposition, drop casting or printing: Scientists have developed organic semiconductor nanosheets, which can easily be removed from a growth substrate and placed on other substrates.

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2017-05-08T07:57:08+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46574.php Flexible, organic and biodegradable - a new wave of electronics

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A new semiconductor is as flexible as skin and easily degradable. It could have diverse medical and environmental applications, without adding to the mounting pile of global electronic waste.

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2017-05-03T07:31:46+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46513.php Nano-notch sends self-assembling polymers into a spiral

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Template modification could speed up the fabrication of sensing substrates and other novel structures.

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2017-04-25T16:18:23+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46486.php Freezing lithium batteries may make them safer and bendable

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Engineers use ice-templating to control electrolyte structure in lithium batteries; solid-state is non-flammable, non-toxic and flexible with longer battery life.

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2017-04-24T13:39:35+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46478.php Novel nanotube structure strengthens thin films for flexible electronics

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Reflecting the structure of composites found in nature and the ancient world, researchers have synthesized thin carbon nanotube textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

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2017-04-21T19:49:32+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46472.php Molecular libraries for organic light-emitting diodes

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By means of a new screening process, it is now possible to identify more quickly lead structures with superior luminescence and charge-transport properties.

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2017-04-21T13:54:01+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46443.php Graphene 'copy machine' may produce cheap semiconductor wafers

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Engineers use graphene as a 'copy machine' to produce cheaper semiconductor wafers.

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2017-04-19T16:48:25+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46436.php NANOLEAP open call

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Get free access to the NANOLEAP Network of Pilot Lines for a 6 month research project on nanocomposites.

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2017-04-19T12:44:16+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46423.php New perovskite ink opens window for quality solar cells

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A new perovskite ink with a long processing window allows the scalable production of perovskite thin films for high-efficiency solar cells.

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2017-04-18T15:02:17+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46417.php Better living through pressure: functional nanomaterials made easy (w/video)

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Using pressure instead of chemicals, a team has fabricated nanoparticles into nanowire-array structures similar to those that underlie the surfaces of touch-screens for sensors, computers, phones and TVs.

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2017-04-18T12:36:27+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46390.php Low haze structures for transparent flexible electrodes by electrospinning processes

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Electrospinning is a technique that produces ultra-fine fibers that are up to 100 times thinner than a human hair. These fibers are collected on glass or on foils in an unstructured, wide mesh net. When conductive materials are spun, flexible conductive transparent electrodes could be produced.

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2017-04-13T09:20:45+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46366.php Silver circuits on foil allow curved touchscreens

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Until now, different conductive paths had to be manufactured in several steps in time-consuming processes. With photochemical metallization this is now possible in one single step on flexible substrates.

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2017-04-11T10:52:03+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46375.php Self-assembling polymers provide thin nanowire template

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Researchers have developed a new way to create some of the world?s thinnest wires, using a process that could enable mass manufacturing with standard types of equipment.

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2017-04-12T09:24:24+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46346.php New nanocoating for space tech applications

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Experimental physicists have developed a thin nanomaterial with superconducting properties. Below about -200 C these materials conduct electricity without loss, levitate magnets and can screen magnetic fields.

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2017-04-06T22:01:13+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46347.php Printed transistors consisting entirely of 2-D nanomaterials

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Leading innovation could transform everyday products (like your milk carton) into intelligent smart devices.

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2017-04-06T22:07:20+00:00 Nanowerk Nanotechnology News
http://www.azonano.com/news.aspx?newsID=35505 Researchers Use Flash Light Interactions to Improve Silver Nanowires for Flexible Transparent Conducting Electrodes

Flexible transparent conducting electrodes (FTCEs) are an essential element of flexible optoelectronics for next-generation wearable displays, augmented reality (AR), and the Internet of Things...

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2017-04-05T13:57:00+00:00 AZoNano.com - Nanotechnology News Feed
http://www.nanowerk.com/nanotechnology-news/newsid=46326.php Engineers develop novel lens for super-resolution imaging

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Discovery breaks resolution limitations in microscopy; Potential applications in high precision failure inspection and biological research.

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2017-04-05T06:24:02+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46332.php Carbon nanotubes self-assemble into tiny transistors

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Researchers have developed a method to select semiconducting nanotubes from a solution and make them self-assemble on a circuit of gold electrodes.

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2017-04-05T12:51:36+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46342.php A better understanding of nanomaterials

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In the past six years, the project 'Opportunities and Risks of Nanomaterials' intensively studied the development, use, behaviour and degradation of engineered nanomaterials, including their impact on humans and on the environment.

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2017-04-06T07:07:08+00:00 Nanowerk Nanotechnology News
http://feedproxy.google.com/~r/NanotechwebTechUpdate/~3/DWKyg9FP10w/68331 Flash Nano: No compromise – hexagonal boron nitride production scales up ]]>

Large quantities of high-quality 2D hexagonal boron nitride can be produced by diffusion and segregation of chemical vapour deposits.

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2017-03-29T14:14:41+00:00 Anna Demming nanotechweb.org: tech update
http://feedproxy.google.com/~r/NanotechwebYourNews/~3/FmbOVDcLJp0/68360 Press release: Built from the bottom up, nanoribbons pave the way to ‘on–off’ states for graphene ]]> ]]> 2017-03-31T17:10:25+00:00 nanotechweb.org: your news http://www.azonano.com/news.aspx?newsID=35491 New Layered Material Could Help Develop Reduced Graphene Oxide-Based Transistors

A research team at North Carolina State University (NC State) has developed a new method for changing positively charged (p-type) reduced graphene oxide (rGO) into negatively charged (n-type) rGO....

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2017-03-31T16:55:00+00:00 AZoNano.com - Nanotechnology News Feed
http://www.nanowerk.com/nanotechnology-news/newsid=46277.php New ultrafast flexible and transparent memory devices could herald new era of electronics

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An innovative new technique to produce the quickest, smallest, highest-capacity memories for flexible and transparent applications could pave the way for a future golden age of electronics.

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2017-03-31T06:27:14+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46285.php Next generation perovskite solar cells with new world-record performance

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A recent study has presented a new cost-efficient way to produce inorganic-organic hybrid perovskite solar cells which sets a new world-record efficiency performance, in particular photostability.

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2017-03-31T23:34:47+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46287.php Graphene lid revitalizes imaging technique

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By capping liquids with graphene, an ultrathin sheet of pure carbon, researchers have revitalized and extended a powerful technique to image surfaces.

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2017-03-31T23:49:30+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46289.php Fast and simple way to make highly ordered porous films

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Researchers have developed a new method to create films of porous metal-organic frameworks fully aligned on inorganic substrates. The method is simple, requiring only that the substrate and an organic linker are mixed under mild conditions, and fast, producing perfectly aligned films within minutes.

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2017-04-03T09:25:45+00:00 Nanowerk Nanotechnology News
http://www.rdmag.com/news/2017/03/new-projects-create-foundation-next-gen-flexible-electronics New Projects Create a Foundation for Next-Gen Flexible Electronics
News
Flexible electronics are circuits and systems that can be bent, folded, stretched or conformed without losing their functionality.
Contributed Author: 
Georgia Institute of Technology
Topics: 
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News
Flexible electronics are circuits and systems that can be bent, folded, stretched or conformed without losing their functionality.
Contributed Author: 
Georgia Institute of Technology
Topics: 
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2017-03-28T11:45:00+00:00 rbushey R&D Mag - Manufacturing
http://www.nanowerk.com/nanotechnology-news/newsid=46232.php A big leap toward tinier lines

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Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns.

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2017-03-28T03:58:47+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46241.php Ink-jet printable and biocompatible layered electronics

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Researchers have developed biocompatible, water-based inks containing graphene and related layered materials as building blocks for ink-jet printable electronic devices.

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2017-03-28T21:26:27+00:00 Nanowerk Nanotechnology News
http://feeds.lexblog.com/~r/NanoAndOtherEmergingChemicalTechnologiesBlog/~3/c0IxSGSqcNw/ CRS Report on Science and Technology Issues in the 115th Congress Includes Nanotechnology and the NNI The Congressional Research Service (CRS) prepared a March 14, 2017, report entitled Science and Technology Issues in the 115th Congress.  The report outlines science and technology policy issues that may come before the 115th Congress.  The report notes that, given the rapid pace of science and technology advancement and its importance in many diverse public policy issues, issues not discussed in this report may come before Congress.  The selected issues are grouped into nine categories.  The category Physical and Material Sciences includes the subcategory “Nanotechnology and the National Nanotechnology Initiative (NNI).”  The report states that development of this field has been fostered by “significant and sustained” public investments in nanotechnology research and development (R&D).  In 2001, President Clinton launched the NNI to accelerate and focus nanotechnology R&D to achieve scientific breakthroughs and to enable the development of new materials, tools, and products.  According to the report, more than 60 nations subsequently established programs similar to the NNI.  Through fiscal year (FY) 2016, Congress appropriated approximately $21.8 billion for nanotechnology R&D; the President requested $1.4 billion in FY 2017 funding.  In 2003, Congress enacted the 21st Century Nanotechnology Research and Development Act (P.L. 108-153), providing a legislative foundation for some of the activities of the NNI, establishing programs, assigning agency responsibilities, and setting authorization levels through FY 2008.  The report notes that although legislation has been introduced in successive Congresses to amend and reauthorize the Act, none has been enacted into law.  According to the report, Congress “has directed its attention primarily to three topics that may affect the realization of nanotechnology’s hoped-for potential:  R&D funding; U.S. competitiveness; and environmental, health, and safety (EHS) concerns.”

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The Congressional Research Service (CRS) prepared a March 14, 2017, report entitled Science and Technology Issues in the 115th Congress.  The report outlines science and technology policy issues that may come before the 115th Congress.  The report notes that, given the rapid pace of science and technology advancement and its importance in many diverse public policy issues, issues not discussed in this report may come before Congress.  The selected issues are grouped into nine categories.  The category Physical and Material Sciences includes the subcategory “Nanotechnology and the National Nanotechnology Initiative (NNI).”  The report states that development of this field has been fostered by “significant and sustained” public investments in nanotechnology research and development (R&D).  In 2001, President Clinton launched the NNI to accelerate and focus nanotechnology R&D to achieve scientific breakthroughs and to enable the development of new materials, tools, and products.  According to the report, more than 60 nations subsequently established programs similar to the NNI.  Through fiscal year (FY) 2016, Congress appropriated approximately $21.8 billion for nanotechnology R&D; the President requested $1.4 billion in FY 2017 funding.  In 2003, Congress enacted the 21st Century Nanotechnology Research and Development Act (P.L. 108-153), providing a legislative foundation for some of the activities of the NNI, establishing programs, assigning agency responsibilities, and setting authorization levels through FY 2008.  The report notes that although legislation has been introduced in successive Congresses to amend and reauthorize the Act, none has been enacted into law.  According to the report, Congress “has directed its attention primarily to three topics that may affect the realization of nanotechnology’s hoped-for potential:  R&D funding; U.S. competitiveness; and environmental, health, and safety (EHS) concerns.”

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2017-03-21T14:28:17+00:00 Lynn L. Bergeson and Carla N. Hutton Nano and Other Emerging Chemical Technologies Blog
http://feeds.lexblog.com/~r/NanoAndOtherEmergingChemicalTechnologiesBlog/~3/Q1YTW4Ep724/ SCCS Issues Final Opinion on Additional Coatings for Titanium Dioxide (Nano Form) as UV-Filter in Dermally Applied Cosmetic Products On March 7, 2017, the Scientific Committee on Consumer Safety (SCCS) issued a final opinion on additional coatings for titanium dioxide (nano form) coated with cetyl phosphate, manganese dioxide, or triethoxycaprylylsilane as an ultraviolet (UV)-filter in dermally applied cosmetics.  The conclusion states that given a general lack of dermal absorption and low general toxicity of nano-forms of titanium dioxide, SCCS considers that the use of the three titanium dioxide nanomaterials, coated with either cetyl phosphate, manganese dioxide, or triethoxycaprylylsilane, can be considered safe for use in cosmetic products intended for application on healthy, intact, or sunburned skin.  SCCS notes that the ingredients used in some types of products (e.g., in lipsticks) may be incidentally ingested.  The potential harmful effects of manganese dioxide should therefore be taken into account if the manganese dioxide-coated nanomaterials are to be used for applications that could lead to oral ingestion.  The opinion does not apply to applications that might lead to exposure of the consumer’s lungs to the titanium dioxide nanoparticles through the inhalation route (such as powders or sprayable products).  SCCS states that if any new evidence emerges in the future to show that the titanium dioxide nanoparticles used in a sunscreen formulation can penetrate skin to reach viable cells, then it may consider revising this assessment.  SCCS notes that the opinion does not consider the potential ecotoxicological impacts of nano titanium dioxide when released into the environment.  As reported in our March 14, 2017, blog item, SCCS has begun a public consultation on its opinion on titanium dioxide (nano form) as UV-filter in sprays.  The public consultation will end May 14, 2017.

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On March 7, 2017, the Scientific Committee on Consumer Safety (SCCS) issued a final opinion on additional coatings for titanium dioxide (nano form) coated with cetyl phosphate, manganese dioxide, or triethoxycaprylylsilane as an ultraviolet (UV)-filter in dermally applied cosmetics.  The conclusion states that given a general lack of dermal absorption and low general toxicity of nano-forms of titanium dioxide, SCCS considers that the use of the three titanium dioxide nanomaterials, coated with either cetyl phosphate, manganese dioxide, or triethoxycaprylylsilane, can be considered safe for use in cosmetic products intended for application on healthy, intact, or sunburned skin.  SCCS notes that the ingredients used in some types of products (e.g., in lipsticks) may be incidentally ingested.  The potential harmful effects of manganese dioxide should therefore be taken into account if the manganese dioxide-coated nanomaterials are to be used for applications that could lead to oral ingestion.  The opinion does not apply to applications that might lead to exposure of the consumer’s lungs to the titanium dioxide nanoparticles through the inhalation route (such as powders or sprayable products).  SCCS states that if any new evidence emerges in the future to show that the titanium dioxide nanoparticles used in a sunscreen formulation can penetrate skin to reach viable cells, then it may consider revising this assessment.  SCCS notes that the opinion does not consider the potential ecotoxicological impacts of nano titanium dioxide when released into the environment.  As reported in our March 14, 2017, blog item, SCCS has begun a public consultation on its opinion on titanium dioxide (nano form) as UV-filter in sprays.  The public consultation will end May 14, 2017.

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2017-03-22T21:51:19+00:00 Lynn L. Bergeson and Carla N. Hutton Nano and Other Emerging Chemical Technologies Blog
http://link.springer.com/10.1007/s12274-017-1573-8 Freestanding hierarchical porous carbon film derived from hybrid nanocellulose for high-power supercapacitors Abstract

Nanocellulose is a sustainable and eco-friendly nanomaterial derived from renewable biomass. In this study, we utilized the structural advantages of two types of nanocellulose and fabricated freestanding carbonized hybrid nanocellulose films as electrode materials for supercapacitors. The long cellulose nanofibrils (CNFs) formed a macroporous framework, and the short cellulose nanocrystals were assembled around the CNF framework and generated micro/mesopores. This two-level hierarchical porous structure was successfully preserved during carbonization because of a thin atomic layer deposited (ALD) Al2O3 conformal coating, which effectively prevented the aggregation of nanocellulose. These carbonized, partially graphitized nanocellulose fibers were interconnected, forming an integrated and highly conductive network with a large specific surface area of 1,244 m2·g–1. The two-level hierarchical porous structure facilitated fast ion transport in the film. When tested as an electrode material with a high mass loading of 4 mg·cm–2 for supercapacitors, the hierarchical porous carbon film derived from hybrid nanocellulose exhibited a specific capacitance of 170 F·g–1 and extraordinary performance at high current densities. Even at a very high current of 50 A·g–1, it retained 65% of its original specific capacitance, which makes it a promising electrode material for high-power applications.

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Abstract

Nanocellulose is a sustainable and eco-friendly nanomaterial derived from renewable biomass. In this study, we utilized the structural advantages of two types of nanocellulose and fabricated freestanding carbonized hybrid nanocellulose films as electrode materials for supercapacitors. The long cellulose nanofibrils (CNFs) formed a macroporous framework, and the short cellulose nanocrystals were assembled around the CNF framework and generated micro/mesopores. This two-level hierarchical porous structure was successfully preserved during carbonization because of a thin atomic layer deposited (ALD) Al2O3 conformal coating, which effectively prevented the aggregation of nanocellulose. These carbonized, partially graphitized nanocellulose fibers were interconnected, forming an integrated and highly conductive network with a large specific surface area of 1,244 m2·g–1. The two-level hierarchical porous structure facilitated fast ion transport in the film. When tested as an electrode material with a high mass loading of 4 mg·cm–2 for supercapacitors, the hierarchical porous carbon film derived from hybrid nanocellulose exhibited a specific capacitance of 170 F·g–1 and extraordinary performance at high current densities. Even at a very high current of 50 A·g–1, it retained 65% of its original specific capacitance, which makes it a promising electrode material for high-power applications.

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2017-03-24T00:00:00+00:00 Latest Results for Nano Research
http://link.springer.com/10.1007/s12274-017-1534-2 Rapid growth of angle-confined large-domain graphene bicrystals Abstract

In the chemical vapor deposition growth of large-area graphene polycrystalline thin films, the coalescence of randomly oriented graphene domains results in a high density of uncertain grain boundaries (GBs). The structures and properties of various GBs are highly dependent on the misorientation angles between the graphene domains, which can significantly affect the performance of the graphene films and impede their industrial applications. Graphene bicrystals with a specific type of GB can be synthesized via the controllable growth of graphene domains with a predefined lattice orientation. Although the bicrystal has been widely investigated for traditional bulk materials, no successful synthesis strategy has been presented for growing two-dimensional graphene bicrystals. In this study, we demonstrate a simple approach for growing well-aligned large-domain graphene bicrystals with a confined tilt angle of 30° on a facilely recrystallized single-crystal Cu (100) substrate. Control of the density of the GBs with a misorientation angle of 30° was realized via the controllable rapid growth of subcentimeter graphene domains with the assistance of a cooperative catalytic surface-passivation treatment. The large-area production of graphene bicrystals consisting of the sole specific GBs with a tunable density provides a new material platform for fundamental studies and practical applications.

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Abstract

In the chemical vapor deposition growth of large-area graphene polycrystalline thin films, the coalescence of randomly oriented graphene domains results in a high density of uncertain grain boundaries (GBs). The structures and properties of various GBs are highly dependent on the misorientation angles between the graphene domains, which can significantly affect the performance of the graphene films and impede their industrial applications. Graphene bicrystals with a specific type of GB can be synthesized via the controllable growth of graphene domains with a predefined lattice orientation. Although the bicrystal has been widely investigated for traditional bulk materials, no successful synthesis strategy has been presented for growing two-dimensional graphene bicrystals. In this study, we demonstrate a simple approach for growing well-aligned large-domain graphene bicrystals with a confined tilt angle of 30° on a facilely recrystallized single-crystal Cu (100) substrate. Control of the density of the GBs with a misorientation angle of 30° was realized via the controllable rapid growth of subcentimeter graphene domains with the assistance of a cooperative catalytic surface-passivation treatment. The large-area production of graphene bicrystals consisting of the sole specific GBs with a tunable density provides a new material platform for fundamental studies and practical applications.

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2017-03-24T00:00:00+00:00 Latest Results for Nano Research
http://link.springer.com/10.1007/s12274-017-1523-5 Curved copper nanowires-based robust flexible transparent electrodes via all-solution approach Abstract

Curved Cu nanowire (CCN)-based high-performance flexible transparent conductive electrodes (FTCEs) were fabricated via a fully solution-processed approach, involving synthesis, coating, patterning, welding, and transfer. Each step involved an innovative technique for completing the all-solution processes. The high-quality and well-dispersed CCNs were synthesized using a multi-polyol method through the synergistic effect of specific polyol reduction. To precisely control the optoelectrical properties of the FTCEs, the CCNs were uniformly coated on a polyimide (PI) substrate via a simple meniscus-dragging deposition method by tuning several coating parameters. We also employed a polyurethane (PU)-stamped patterning method to effectively produce 20 μm patterns on CCN thin films. The CCN thin films exhibited high electrical performance, which is attributed to the deeply percolated CCN network formed via a solvent-dipped welding method. Finally, the CCN thin films on the PI substrate were partially embedded and transferred to the PU matrix to reduce their surface roughness. Through consecutive processes involving the proposed methods, a highly percolated CCN thin film on the PU matrix exhibited high optoelectrical performance (R s = 53.48 Ω/□ at T = 85.71%), excellent mechanical properties (R/R 0 < 1.10 after the 10th repetition of tape peeling or 1,000 bending cycles), and a low root-mean-square surface roughness (R rms = 14.36 nm).

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Abstract

Curved Cu nanowire (CCN)-based high-performance flexible transparent conductive electrodes (FTCEs) were fabricated via a fully solution-processed approach, involving synthesis, coating, patterning, welding, and transfer. Each step involved an innovative technique for completing the all-solution processes. The high-quality and well-dispersed CCNs were synthesized using a multi-polyol method through the synergistic effect of specific polyol reduction. To precisely control the optoelectrical properties of the FTCEs, the CCNs were uniformly coated on a polyimide (PI) substrate via a simple meniscus-dragging deposition method by tuning several coating parameters. We also employed a polyurethane (PU)-stamped patterning method to effectively produce 20 μm patterns on CCN thin films. The CCN thin films exhibited high electrical performance, which is attributed to the deeply percolated CCN network formed via a solvent-dipped welding method. Finally, the CCN thin films on the PI substrate were partially embedded and transferred to the PU matrix to reduce their surface roughness. Through consecutive processes involving the proposed methods, a highly percolated CCN thin film on the PU matrix exhibited high optoelectrical performance (R s = 53.48 Ω/□ at T = 85.71%), excellent mechanical properties (R/R 0 < 1.10 after the 10th repetition of tape peeling or 1,000 bending cycles), and a low root-mean-square surface roughness (R rms = 14.36 nm).

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2017-03-24T00:00:00+00:00 Latest Results for Nano Research
http://www.nanowerk.com/nanotechnology-news/newsid=46227.php How graphene could cool smartphone, computer and other electronics chips

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With graphene, researchers have discovered a powerful way to cool tiny chips - key components of electronic devices with billions of transistors apiece.

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2017-03-27T06:23:57+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46218.php Plugging leaks in printable logic

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Self-assembling thin films make it possible to produce flexible electronic devices using a single plastic transistor.

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2017-03-24T06:58:35+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46166.php Electrocrystallization: Breakthrough in gold nanoparticle research

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Research team discovers how to prepare high-quality crystals formed of gold nanoparticles.

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2017-03-21T07:46:30+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/spotlight/spotid=46170.php Transforming greenhouse gas CO2 into carbon nanotubes

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In two new studies, researchers show that cement plants can have their carbon dioxide exhaust eliminated while co-producing carbon nanotubes. They demonstrate that with their C2CNT (carbon dioxide into carbon nanotubes) process, a wide portfolio of tailored carbon nanotubes, such as those with special shapes or conductivity can be made. C2CNT is a straightforward process that transforms CO2 to carbon nanotubes by molten electrolysis with inexpensive (nickel and steel) electrodes and low voltage. This synthesis consumes only CO2 and electricity, and is constrained only by the cost of electricity.

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2017-03-21T10:41:44+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46181.php Transparent silver: Tarnish-proof films for flexible displays, touch screens, metamaterials

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The thinnest, smoothest layer of silver that can survive air exposure has been laid down by scientists, and it could change the way touchscreens and flat or flexible displays are made.

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2017-03-21T21:04:18+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46189.php Towards super-efficient, ultra-thin silicon solar cells

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Researchers optimize nanophotonic light trapping.

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2017-03-21T23:47:04+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46193.php Imprinting nanopatterns in metals with diamonds

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Materials scientists are imprinting nano-patterns in metals, a technology that could give metallic surfaces permanent functionality, like a lotus effect or reduced frictional properties.

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2017-03-22T12:10:13+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46197.php Molecular 'treasure maps' to help discover new materials

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Researchers have developed a new method which has the potential to revolutionize the way we search for, design and produce new materials.

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2017-03-22T23:01:49+00:00 Nanowerk Nanotechnology News
http://www.nanowerk.com/nanotechnology-news/newsid=46115.php A groundbreaking process for creating ultra-selective separation membranes

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Discovery could greatly improve energy-efficiency of separation and purification processes in the chemical and petrochemical industries.

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2017-03-15T22:46:39+00:00 Nanowerk Nanotechnology News