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National Nanotechnology Initiative publishes report assessing the status of EHS risk science

National Nanomanufacturing Network - March 27, 2015 - 3:38am
The National Nanotechnology Initiative (NNI) today published the report from the workshop, “Stakeholder Perspectives on Perception, Assessment,and Management of the Potential Risks of Nanotechnology” (R3 Workshop), which was held September 10-11, 2013, in Washington, D.C. The goal of the workshop was to assess the status of nanotechnology environmental, health, and safety (EHS) risk science three years after the development of the 2011 NNI EHS Research Strategy and to identify the tools and best practices used by risk assessors to address the implications of nanotechnology. A wide range of stakeholders including Federal and State regulators, small and large businesses, insurance companies, academic researchers, occupational safety specialists, and public and environmental advocacy groups shared their perspectives on the risk management process; discussed strategies and approaches for improving risk science methods; and examined ways that NNI agencies can assist stakeholders in the image002.jpgresponsible development of nanotechnology. Stakeholders participating in the workshop presented their perspectives and methods used to assess and manage the potential risks of nanotechnology. Research presented at the workshop shows that technical risk data alone will not enable decisions; risk evaluations by different stakeholders with varying biases, values, and stances can affect the perceptions and behaviors (e.g., investment or personal safety decisions) of consumers, regulators, developers, manufacturers, and insurers. Following a robust dialogue among participants, including a variety of stakeholder perspectives, participants identified needs in four areas. (The following list is not prioritized): Communication Resources, including improved transparency in reporting the presence of engineered nanomaterials (ENMs) and continued collaboration among diverse stakeholder groups.Decision Tools, such as improved detection and characterization tools; improved methods for assessing both actual exposure to and potential risk from ENMs; tools to address nanotechnology-related environmental, health, and safety (“nanoEHS”) issues sooner in the product life cycle.Data Resources, such as repositories or databases to facilitate access to or organization of existing information on nanoEHS; methods for accessing and investigating potentially protected information; and continued toxicology studies on the effects of ENMs.Standards and Guidance Resources, in order to facilitate navigation of nanotechnology-enabled applications through the regulatory process and improved data quality and methods for reporting data used in nanomaterial risk assessment. You can download full document from the InterNano Library (http://eprints.internano.org/2229/) Source: National Nanotechnology Initiative (http://www.nano.gov/node/1350)

Square ice forms in graphene sandwich

Nanotechweb - March 26, 2015 - 7:39am
Researchers discover a new phase of water.
Categories: Nanotechnology News

Gold nanostars enhance MRI signal

Nanotechweb - March 26, 2015 - 7:00am
DNA–gadolinium nanoconjugates make highly efficient contrast agents for magnetic resonance imaging.
Categories: Nanotechnology News

Solar Cells with Tunable Colors

National Nanomanufacturing Network - March 26, 2015 - 5:27am
With rising levels of atmospheric carbon dioxide and indicators for global climate change increasingly apparent, the search has intensified for more sustainable and renewable alternative energy sources. Photovoltaic (PV) energy has been of interest for the last 40 years; however, the cost of Si-based solar panels is still not cost-effective for widespread usage. In addition to the overall cost, consumer adoption of this technology has been slow due to the unattractive aesthetics of traditional solar panels. Building integrated photovoltaics (BIPVs) such as Dow PowerhouseTM Solar Shingles have reached the market, but have not yet been widely adopted. In order for PV technology to be widely accepted, it will need to be seamlessly incorporated into existing infrastructures such as building and automotive materials, and be available in a variety of colors. Among the various types of emerging PV technologies such as dye-sensitized solar cells (DSSCs), organic cells, and quantum dots (QDs), perovskite solar cells represent one of the most promising sectors. In a span of only 5 years, the efficiency of perovskite PVs has increased from ca. 3% to a current level in excess of 20%. This efficiency is now comparable to that of crystalline Si and semiconductor thin films (e.g., copper indium gallium selenide (CIGS), CdTe) that have been in development since the 1970’s. Perovskite solar technology utilizes a hybrid inorganic-organic halide perovskite (e.g., CH3NH3MI3 where M = Sn, Pb) in combination with n- and p-type charge collection layers. In a promising step toward aesthetically attractive solar panels, Zhang and coworkers describe the fabrication of perovskite photovoltaic devices that are color-tunable. In order to maximize the refractive index contrast among the layers in the device, nanoparticulate films of porous SiO2 (50% porosity) and dense TiO2 (4% porosity) were deposited by simple spin-coating. The combination of the photonic properties of the oxide nanoparticle films and absorptive properties of the overlying perovskite material was used to fine-tune the observed color range from orange to blue. Interestingly, the strategy employed by these researchers may be considered as a biomimetic approach, since beetles and butterflies also employ reflective and absorptive layers that yield a characteristic and often tunable color. Many gemstones such as opals also utilize the photonic crystal effect to give rise to iridescent colors. The use of a photonic phenomenon for color generation in this multilayered PV device is preferred rather than using dyes or pigments, since the latter would likely fade over time. The best power conversion efficiency observed in this work was 8.8% for blue-colored cells. While this is low relative to traditional perovskite-based PV devices, this may be compared to 9.5% for a reference cell employing mesoporous SiO2. Hence, the operating efficiency of the device is not significantly deteriorated by the reflective processes occurring in the photonic component of the device, which is responsible for the observable colors. Further fine-tuning of the perovskite layers, interfaces, and nanoparticle sizes and porosities will likely improve the overall efficiency, while expanding its color palette. It would be interesting to extend this approach to other emerging technologies and thin film semiconductors to introduce other options for colorful solar panels. As decorative options become more plentiful and efficiencies continue to rise, consumers will more likely adopt this technology to power their homes and begin to wean themselves from nonrenewable fossil fuels. Electric and hybrid vehicles employing solar panels that match the color of the exterior paint would also be much more attactive to consumers relative to traditional solar panels already used by some vehicles (e.g., Fisker Karma). Reference: Zhang W, Anaya M, Lozano G, Calvo ME, Johnston MB, Míguez H, Snaith HJ. Highly Efficient Perovskite Solar Cells with Tunable Structural Color. Nano Letters. 2015; 15 (3): 1698-1702 doi: 10.1021/nl504349z (http://pubs.acs.org/doi/abs/10.1021/nl504349z) Image reprinted with permission from American Chemical Society.

Dolomite’s microfluidics technology ideal for B cell encapsulation

Nanotech-Now - March 25, 2015 - 7:45am
A Dolomite droplet generation system is helping researchers at Weill Cornell Medical College in New York, USA, to encapsulate human and mouse B cells for the cloning of antibody genes. Associate Profe...
Categories: Nanotechnology News

NXP and GLOBALFOUNDRIES Announce Production of 40nm Embedded Non-Volatile Memory Technology: Co-developed technology to leverage GLOBALFOUNDRIES 40nm process technology platform

Nanotech-Now - March 25, 2015 - 7:45am
•Successful joint development and production-ready technology enables NXP to further proliferate in smart card and near-field communications IC markets. •GLOBALFOUNDRIES is the first wafer foundry...
Categories: Nanotechnology News

New kind of 'tandem' solar cell developed: Researchers combine 2 types of photovoltaic material to make a cell that harnesses more sunlight

Nanotech-Now - March 25, 2015 - 7:45am
Researchers at MIT and Stanford University have developed a new kind of solar cell that combines two different layers of sunlight-absorbing material in order to harvest a broader range of the sun's en...
Categories: Nanotechnology News

Bar-Ilan U. researchers identify 'tipping point' between quantum and classical worlds: Study sheds new light on 'spooky' quantum optics

Nanotech-Now - March 25, 2015 - 7:45am
If we are ever to fully harness the power of light for use in optical devices, it is necessary to understand photons - the fundamental unit of light. Achieving such understanding, however, is easier s...
Categories: Nanotechnology News

Tiny bio-robot is a germ suited-up with graphene quantum dots

Nanotech-Now - March 25, 2015 - 7:45am
As nanotechnology makes possible a world of machines too tiny to see, researchers are finding ways to combine living organisms with nonliving machinery to solve a variety of problems.
Categories: Nanotechnology News

UW scientists build a nanolaser using a single atomic sheet

Nanotech-Now - March 25, 2015 - 7:45am
University of Washington scientists have built a new nanometer-sized laser -- using the thinnest semiconductor available today -- that is energy efficient, easy to build and compatible with existing e...
Categories: Nanotechnology News

Building shape inspires new material discovery

Nanotech-Now - March 25, 2015 - 7:45am
Physicists inspired by the radical shape of a Canberra building have created a new type of material which enables scientists to put a perfect bend in light.
Categories: Nanotechnology News

Iranian Researchers Present Model to Determine Dynamic Behavior of Nanostructures

Nanotech-Now - March 25, 2015 - 7:45am
Researchers from an Iranian university modeled and analyzed non-linear dynamic behavior and instability of nanostructures in the presence of external driving factors.
Categories: Nanotechnology News

NNI Publishes Workshop Report Assessing the Status of EHS Risk Science: Report examines progress three years after the release of the 2011 NNI EHS Research Strategy

Nanotech-Now - March 25, 2015 - 7:45am
The National Nanotechnology Initiative (NNI) today published the report from the workshop, "Stakeholder Perspectives on Perception, Assessment, and Management of the Potential Risks of Nanotechnology"...
Categories: Nanotechnology News

EEE Photonics Society’s Fourth Annual Optical Interconnects Conference Seeks to Bring Together the Latest Advanced Optical Interconnect Technologies, Systems & Architectures for the Next Generation of Supercomputers & Datacenters

Nanotech-Now - March 25, 2015 - 7:45am
The IEEE Photonics Society will hold the fourth annual Optical Interconnects Conference on 20 - 22 April 2015 at the Wyndham San Diego Bayside Hotel in San Diego, CA. Established more than 25 years ag...
Categories: Nanotechnology News

New processing technology converts packing peanuts to battery components

Nanotech-Now - March 23, 2015 - 7:45am
Upcycling of Packing-Peanuts into Carbon Microsheet Anodes for Lithium-Ion Batteries Vinodkumar Etacheri, Chulgi Nathan Hong, and Vilas G. Pol * School of Chemical Engineering, Purdue University ...
Categories: Nanotechnology News

Halas, Nordlander awarded Optical Society's R.W. Wood Prize: Rice University researchers recognized for pioneering nanophotonics

Nanotech-Now - March 23, 2015 - 7:45am
The Optical Society has awarded Rice University researchers Naomi Halas and Peter Nordlander the prestigious 2015 R.W. Wood Prize for their groundbreaking work in nanophotonics.
Categories: Nanotechnology News

Nanotechnology Enabled Drug Delivery to Influence Future Diagnosis and Treatments of Diseases

Nanotech-Now - March 23, 2015 - 7:45am
Diagnosis and drug delivery for diseases like cancer, cardiovascular and genetic ailments has always been a concern. In recent years, however, new strides and developments in the nano-medicine market...
Categories: Nanotechnology News

Hiden Instruments identified in London Stock Exchange’s ‘1000 Companies to Inspire Britain'

Nanotech-Now - March 23, 2015 - 7:45am
• Hiden Instruments recognised in second edition of London Stock Exchange's 1000 Companies to Inspire Britain report 2015 • Identifies fastest-growing and most dynamic small and m...
Categories: Nanotechnology News

How green tea could help improve MRIs

Nanotech-Now - March 23, 2015 - 7:45am
Green tea's popularity has grown quickly in recent years. Its fans can drink it, enjoy its flavor in their ice cream and slather it on their skin with lotions infused with it. Now, the tea could have...
Categories: Nanotechnology News

Nanocomposites Market Growth, Industry Outlook To 2020 by Grand View Research, Inc.

Nanotech-Now - March 23, 2015 - 7:45am
Grand View Research.com has announced the addition of "Global Nanocomposites Market Analysis And Segment Forecasts To 2020" Market Research report to their Database.
Categories: Nanotechnology News