Nano News & Events

Black gold maximizes the light absorption of nanomaterials

InterNano Industry News - March 24, 2017 - 3:45am
Maximizing light absorption of nanomaterials has been an emerging research field in the recent years due to its attractiveness in a wide range of applications that involves conversion or utilization of solar energy. However, most of the concepts reported are based on multi-layered architecture inspired by optical impedance matching concepts that requires complicated non-scalable fabrication process such as electron beam lithography. Efforts on maximizing light absorption via nanostructuring remain scarce. Researchers have now reported such a material - a nanolayer of black gold.
Categories: Nanotechnology News

Large-yield synthesis of 2D antimonene nanocrystals

InterNano Industry News - March 22, 2017 - 3:45am
Following up on previous theoretical predictions, researchers now have demonstrated two high-yield methods for fabricating antimonenes - wide-band-gap semiconductors that under strain become direct band-gap semiconductors. Such dramatic transitions of electronic properties could open a new door for nanoscale transistors with high on/off ratio, blue/UV optoelectronic devices, and nanomechanical sensors based on new ultrathin semiconductors. The new approach is generic for various transparent conducting oxides as well as other oxide nanocrystal inks.
Categories: Nanotechnology News

Grant will support development of flexible electronics at UMass ... - Plastics News

InterNano Industry News - March 22, 2017 - 3:45am
Plastics NewsGrant will support development of flexible electronics at UMass ...Plastics NewsResearchers from the UMass Lowell Nanomanufacturing Center and Raytheon Integrated Defense Systems are using a $1.89 million Nextflex grant to advance ...NextFlex awards $1.9m to UMass Lowell - The Boston GlobeThe Boston Globeall 2 news articles »
Categories: Nanotechnology News

2016 National Nanotechnology Initiative Strategic Plan

InterNano Industry News - March 22, 2017 - 3:45am
Whitman, Lloyd J. and Henderson, Lori A. and Meador, Michael A. and Friedersdorf, Lisa E. and Standridge, Stacey and Thomas, Treye and Howard, John and Biaggi-Labiosa, Azlin M. and Madsen, Lynnette D. and Cannizzaro, Chris and Jillavenkatesa, Ajit and Bobalek, John F.. National Science and Technology Council, Office of Science and Technology Policy, Nanoscale Science, Engineering, and Technology Subcommittee. (2016) 2016 National Nanotechnology Initiative Strategic Plan. Technical Report. United States National Nanotechnology Initiative. (Unpublished)
Categories: Nanotechnology News

MIT awarded UNESCO Medal for contributions to nanoscience and nanotechnologies

InterNano Industry News - March 22, 2017 - 3:45am
MIT has been honored with the UNESCO Medal for contributions to the development of nanoscience and nanotechnologies by the United Nations Educational, Scientific and Cultural Organization (UNESCO). Established in 2010, the UNESCO Medal has awarded over 30 prominent scientists and public figures for their individual contributions to advancing the fields of nanoscience and nanotechnologies. This year MIT shares the distinction, along with St. Petersburg State University of Information Technologies in Russia, of being the first organization to be recognized. In addition to the two universities, four eminent scientists from Korea, the United Arab Emirates, Ukraine, and the United Kingdom, were recipients of the medal. An awards ceremony was held on Oct. 11 at the UNESCO headquarters in Paris, France. Institute Professor Mildred (Millie) Dresselhaus, a nanoscience pioneer who herself has won many recognitions including the U.S. Presidential Medal of Freedom and the L'Oreal-UNESCO Award for Women in Science, made the trip at the invitation of President Rafael Reif to accept the medal on behalf of MIT. “Using science and technology as a way to bring people together is something MIT has learned to do really well,” says Dresselhaus. “Our faculty, staff, and students come together from countries all over the world with diverse technical backgrounds to work across the many academic departments and laboratories on campus. This culture of interdisciplinary collaboration enables us to work for common goals, so it made sense to me that MIT was recognized as an institution. This should serve as encouragement to move forward as rapidly as possible to complete MIT.nano and to achieve some exceptionally great outcomes through this initiative as it comes to fruition.” The award will eventually be displayed within the public spaces of MIT.nano — the 214,000-square-foot center for nanoscience and nanotechnology that is currently under construction in the heart of the MIT campus — after the building opening in June 2018, says Vladimir Bulović, faculty lead of the project. The UNESCO Medal is an initiative of the International Commission responsible for developing the Encyclopedia of Life Support Systems theme on nanoscience and nanotechnologies. Each year, the medal recognizes those making significant contributions in the field in an effort to showcase the tremendous benefits of progress being made. MIT joins a distinguished group of scientists who have received the medal thus far, including Nobel Prize-winners in physics Zhores Alferov and Isamu Akasaki.
Categories: Nanotechnology News

An economical solution for the removal of selenium contaminants in wastewater

InterNano Industry News - March 22, 2017 - 3:45am
Selenium (Se) is a metalloid element found in trace amounts in the earth’s crust and which has found extensive application due to its semiconducting properties. The use in photocopiers, microelectronic circuits and other applications has created a demand which makes selenium a valuable element. Selenium also shows biological activity with a strong dependence on concentration: it is essential in low doses for mammalian organisms but becomes strongly toxic to humans over a certain intake threshold. Efficient removal of selenium from wastewater being discharged in the environment is imperative and the development of cost-effective procedures to achieve this needs to be addressed. Under typical environmental conditions Se can be found in a variety of oxidation states (-II, 0, IV, and VI). The former two are insoluble and give rise to little toxicity on account of their low mobility in aqueous phases. The latter two however are found as highly mobile oxyanions which are the principal targets for Se removal. Finding the right reagent Ling et al have used an established strategy involving the reduction of Se(IV) to the insoluble Se(0) form, but their choice of nanoscale zero-valent iron (nZVI) as the reagent has led to a superior method of wastewater decontamination being developed. As little as 0.2 g L-1 nZVI can achieve over 99% removal of high levels of Se(IV) within 5 hours. Additionally, on account of the magnetic properties of the nZVI its recovery could be achieved simply with the use of a magnet, leaving pure elemental selenium as the product. The potential for elemental selenium recovery and recycling provides grounding for the method becoming cost-neutral or even profitable. Furthermore, in depth studies were conducted to elucidate the pathway taken by the decontamination process, with attention focused on the nano- and microstructure of the resulting Se particles and of the nZVI before and after reaction. The nZVI particles consist of a metallic iron core surrounded by an oxide layer which under aqueous conditions is capable of performing adsorption of Se oxyanions, thus paving the way for their reduction by the metallic core. Two types of Se structures result following the reductive process: almost perfectly spherical nanoparticles and nano-needles, both being attributed to known forms of elemental Se: amorphous and trigonal, respectively. A complete account of the Se(IV) reduction and Se(0) structure formation mechanisms operating in this process is available in the full article, free to view for a limited time:* Genesis of pure Se(0) nano- and micro-structures in wastewater with nanoscale zero-valent iron (nZVI) Environ. Sci.: Nano, 2016, Advance Article DOI: 10.1039/C6EN00231E About the webwriter Dan Mercea is a PhD student in the Fuchter group at Imperial College London. He is working on developing enantioselective FLP catalysis. —————- *Access is free until 9th December 2016 through a registered RSC account – register here                   
Categories: Nanotechnology News

Connecting two electrodes by liquid crystal-guided carbon nanotube wires

InterNano Industry News - March 22, 2017 - 3:45am
Carbon nanotubes (CNTs) being highly electrically conductive along the tube axis, have gained great research interests in recent years for connecting two conducting electrodes at the nanoscale - where the CNTs can be integrated into a micro- or nanoelectronic system. Therefore, the orientational control of CNTs has drawn a great deal of research interest in nanotechnology. Researchers now have developed a technique to bridge two electrical conductors by assembling CNTs guided by liquid crystals.
Categories: Nanotechnology News

Three UT Austin Professors Named Fellows of the National Academy of Inventors - UT News | The University of Texas at Austin

InterNano Industry News - March 16, 2017 - 3:45am
UT News | The University of Texas at AustinThree UT Austin Professors Named Fellows of the National Academy of InventorsUT News | The University of Texas at AustinSreenivasan has published more than 100 technical articles and holds more than 100 U.S. patents in the area of nanomanufacturing. He has received several awards for his work including the Technology Pioneer Award by the World Economic Forum (2005), ...and more »
Categories: Nanotechnology News

Nano-Nouvelle Trial Delivers Nanotech Breakthrough

InterNano Industry News - March 16, 2017 - 3:45am
A successful production trial by Australian battery technology innovator Nano-Nouvelle has proved its pioneering nanotechnology ­­­supports industrial-scale manufacture, with output rates...
Categories: Nanotechnology News

Nano Nugget featuring Paul Weiss

InterNano Industry News - March 10, 2017 - 4:45am
Date: Fri, 10/14/2016Paul Weiss, Editor-in-Chief of ACS Nano, discusses the exciting potential impacts of nanotechnology at the intersection of other fields. This video was produced by the American Chemical Society. Education center: OffEducation center weight: 0Research centers & networks: OffResearch centers & networks weight: 0Connect with Nano.gov: OffConnect with Nano.gov weight: 0Stay connected with the NNI: OffNews: Nano TV/RadioStay connected with the NNI weight: 0Nanotechnology facts: OffNanotechnology facts weight: 0Catch all weight: 0Featured: offDr. Weiss discusses nanotechnology's impact on other fields. This video was produced by the American Chemical Society.
Categories: Nanotechnology News

Nano Nugget featuring Chad Mirkin

InterNano Industry News - March 10, 2017 - 4:45am
Date: Fri, 10/14/2016Chad Mirkin, Director of the International Institute for Nanotechnology, discusses his research and some promising areas of nanotechnology. This video was produced by the American Chemical Society. Education center: OffEducation center weight: 0Research centers & networks: OffResearch centers & networks weight: 0Connect with Nano.gov: OffConnect with Nano.gov weight: 0Stay connected with the NNI: OffNews: Nano TV/RadioStay connected with the NNI weight: 0Nanotechnology facts: OffNanotechnology facts weight: 0Catch all weight: 0Featured: offDr. Mirkin discusses some promising areas of nanotechnology. This video was produced by the American Chemical Society.
Categories: Nanotechnology News

DNA Scaffold Self-Assembles Into Single-Electron Device

InterNano Industry News - March 8, 2017 - 4:45am
<?xml version="1.0" encoding="UTF-8"?> Self-made DNA scaffold could make the production of single-electron devices far more scalable Illustration: Nanoscience Center/University of Jyväskylä and BioMediTech/University of Tampere To organize nanoparticles into structures that are useful in electronics, researchers have turned to DNA scaffolds that self-assemble into patterns and attract the nanoparticles into functional arrangements. Now researchers at the Nanoscience Center (NSC) of the University of Jyväskylä and BioMediTech (BMT) of the University of Tampere, both in Finland, have used these DNA scaffolds to organize three gold nanoparticles into a single-electron transistor. DNA scaffolds have previously been used to organize gold nanoparticles into patterns. But this work represents the first time that these DNA scaffolds have been used to construct precise, controllable DNA-based assemblies that are fully electrically characterized for use in single-electron nanoelectronics. The immediate benefit: There’s no longer a need to keep these structures at cryogenic temperatures in order for them to work. The way that electron transport occurs in single-electron devices is altogether different than in conventional electronics. With single-electron devices, the electron is governed by quantum mechanics. In these devices, there is what is known as an “island” where electrons are contained and isolated by tunnel junctions  that control electron tunneling. The tunnel junctions operate under the quantum mechanical phenomenon known as the Coulomb Blockade, in which electrons inside the device produce a strong repulsion preventing other electrons from circulating. The Finland-based scientists observed a clear Coulomb Blockade phenomenon with their device—all the way up to room temperature. While this is not the first time that Coulomb Blockade has been observed at temperatures that high, its demonstration in a single-electron device should prove significant for these devices. But, more importantly, the use of a self-assembling DNA scaffold could make the production of these devices far more scalable. “Such a device based on DNA self-assembly would be a vast improvement due to fully parallel fabrication easily scaled for mass-production, which is the property not possible with previous methods demonstrating Coulomb Blockade up to room temperature,” explained Jussi Toppari, a Senior Lecturer at the NSC and a member of the research team, in an e-mail interview with IEEE Spectrum. In research described in the journal Nano Letters , the researchers fabricated a single-electron transistor (SET) that can visualize the effect of single electrons leaving or arriving to the islands of the device via tunneling. “The device was electrically characterized and proven to work at a basic level,” says Toppari. “However, gate dependency could not be fully demonstrated due to technical reasons. A fully working device could be utilized as a transistor or an extremely sensitive electrometer at the nanoscale.” Of course, realizing a full-fledged single-electron device is still going to require some substantial efforts. The main sticking point preventing the full utilization of this method for builing single electron nanoelectronic circuits is the difficulty associated with growing gold nanoparticles, says Toppari. “Otherwise only the DNA-self-assembly sets the limits, and those have been pushed very far already.”
Categories: Nanotechnology News

Mimicking the Veins in a Leaf, Scientists Hope to Make Super-Efficient Displays and Solar Cells

InterNano Industry News - March 4, 2017 - 4:45am
<?xml version="1.0" encoding="UTF-8"?> Fractals and biomimetics just helped to surpass the performance of today’s transparent electrode materials Image: M. Giersig/HZB If you take a close look at a leaf from a tree and you’ll notice the veins that run through it. The structure these veins take are what’s called a quasi-fractal hierarchical networks. Fractals are geometric shapes in which each part has the same statistical character of the whole. Fractal science is used to model everything from snowflakes and the veins of leaves to crystal growth. Now an international team of researchers led by Helmholtz-Zentrum Berlin have mimicked leaves’ quasi-fractal structure and used it to create a network of nanowires for solar cells and touch screen displays. Indium tin oxide (ITO) has been the go-to material for transparent conductors in displays and solar cells. While the costs associated with ITO have been one of the main knocks against it, it’s been difficult for the various nanomaterials proposed as alternatives to replace it.  Nanomaterials—including silver nanowires, carbon nanotubes and graphene—have not only been handicapped by their own relative high costs, but their performance has been somewhat lacking as well. With this new method of distribution, nanowires are able to surpass the performance of traditional ITO layers. The reason for this becomes a little clearer when you go back and look at the leaf. The distribution of veins in the leaf is determined in part by the amount of shade and sunlight the leaf receives. With ITO, the material is spread out in one continuous, uniform film. However, the way the sunlight strikes a solar cell or the way a finger presses on a touch-screen display are not uniform. This reduces the ITO layer’s efficiency. In research described in the journal Nature Communications , the international research team used a quasi-fractal hierarchical network to optimize the distribution of the nanowires on a solar cell according to three conditions: provide maximum surface coverage, achieve a uniform current density, and have a minimal overall resistance. “On the basis of our studies, we were able to develop an economical transparent metal electrode," Michael Giersig, a professor at Helmholtz-Zentrum Berlin and who led the research, said in a press release. “We obtain this by integrating two silver networks. One silver network is applied with a broad mesh spacing between the micron-diameter main conductors that serve as the ‘highway’ for electrons transporting electrical current over macroscopic distances.” Next to this broad highway for the electrons, the researchers added randomly distributed nanowire networks that serve as local conductors to cover the surface between the large mesh elements. “These smaller networks act as regional roadways beside the highways to randomize the directions and strengths of the local currents, and also create refraction effects to improve transparency,” according to Giersig. Solar cells with the leaf-vein network had an efficiency of 5.91 percent in experiments. Those with a standard ITO had 5.37 percent.
Categories: Nanotechnology News

A transparent flexible thin-film triboelectric nanogenerator for scalable electricity generation

InterNano Industry News - March 4, 2017 - 4:45am
A transparent flexible thin-film triboelectric nanogenerator for scalable electricity generationGuang Zhu; Xiao Yan Wei; Zhong Lin WangInternational Journal of Nanomanufacturing, Vol. 12, No. 3/4 (2016) pp. 396 - 403We report a flexible thin-film-based triboelectric nanogenerator (TF-TENG) that has a one-component laminated structure as thin as 100 µm. The electricity-generating process of the TF-TENG takes advantage of the interaction between the TF-TENG and an external object that carries triboelectric charge on the surface. The motion of the object creates electric potential difference between two electrodes on the TF-TENG, which then produces electron flow in the external circuit. When triggered by foot stomping, a TF-TENG (20 cm by 20 cm) spread on the floor could generate an open-circuit voltage of 700 V, a short-circuit current of 3 mA, and an instantaneous power of 168 mW that corresponds to a power density of 4.2 W/m&lt;SUP align="right"&gt;2&lt;/SUP&gt;. The generated electricity could simultaneously power 1,000 LEDs. The TF-TENG can be tailored to any desired size and shape that are suitable in a variety of circumstances as long as contacts with external objects take place. When the TF-TENG is scaled up in area and used in places that have large flows of people such as subway stations and shopping malls, the produced electric energy in total may become considerable.
Categories: Nanotechnology News