InterNano Nanomanufacturing Repository
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Bulk Metallic Glass Nanowire Architecture for Electrochemical Applications
No full textElectrochemical devices have the potential to pose powerful solutions in addressing rising energy demands and counteracting environmental problems. However, currently, these devices suffer from meager performance due to poor efficiency and durability of the catalysts. These suboptimal characteristics have hampered widespread commercialization. Here we report on Pt57.5Cu14.7Ni5.3P22.5 bulk metallic glass (Pt-BMG) nanowires, whose novel architecture and outstanding durability circumvent the performance problems of electrochemical devices. We fabricate Pt-BMG nanowires using a facile and scalable nanoimprinting approach to create dealloyed high surface area nanowire catalysts with high conductivity and activity for methanol and ethanol oxidation. After 1000 cycles, these nanowires maintain 96% of their performance—2.4 times as much as conventional Pt/C catalysts. Their properties make them ideal candidates for widespread commercial use such as for energy conversion/storage and sensors
NNN Partners with NanoBusiness and Commercialization Association for Nanomanufacturing Summit 2011
No full textAs the focus on fundamental science and knowledge over the past decade has now begun to produce dividends demonstrated by the number of nanotechnology-enabled products and market growth, nanomanufacturing remains the essential bridge between the discoveries of the nanosciences and the commercialization of nanotechnologies. Nanomanufacturing, defined as the controllable manipulation of materials structures, components, devices, and systems at the nanoscale (0.1 to 100 nanometers) in one, two, and three dimensions for large-scale reproducibility of value-added components and products, seeks to accelerate the proliferation of nanotechnology enabled products through the development of new process methodologies, tools, materials, and systems that are becoming established within the global manufacturing base. In this manner, many new products, markets, and processes will benefit from value-added commercial products enabled by the collective performance of their nanoscale building blocks. As the focus on fundamental science and knowledge over the past decade has now begun to produce dividends demonstrated by the number of nanotechnology-enabled products and market growth, nanomanufacturing remains the essential bridge between the discoveries of the nanosciences and the commercialization of nanotechnologies. Nanomanufacturing, defined as the controllable manipulation of materials structures, components, devices, and systems at the nanoscale (0.1 to 100 nanometers) in one, two, and three dimensions for large-scale reproducibility of value-added components and products, seeks to accelerate the proliferation of nanotechnology enabled products through the development of new process methodologies, tools, materials, and systems that are becoming established within the global manufacturing base. In this manner, many new products, markets, and processes will benefit from value-added commercial products enabled by the collective performance of their nanoscale building blocks
Physiological effects of magnetite (Fe3O4) nanoparticles on perennial ryegrass (Lolium perenneL.) and pumpkin (Cucurbita mixta) plants
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Nanoinformatics 2011 Supports Updated NNI EHS Research Strategy
No full textThe 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 that efforts must be established to develop consistency in materials characterization between different laboratories, and develop a means to catalogue the data with as much meaningful, consistent information as possible. In this context, the National Nanomanufacturing Network (NNN) hosted Nanoinformatics 2010 in order to bring together the key stakeholders from academic centers, government laboratories, and regulatory agencies to begin to lay the groundwork for a concerted national roadmap in Nanoinformatics. Nanoinformatics 2010 was designed to survey the landscape, generate a roadmap, and stimulate collaborative activities in the area of nanoinformatics. The primary outcome of this workshop was the Nanoinformatics 2020 Roadmap (released April 2011), which was jointly authored by leaders in the nanoinformatics community of practice. Responding to the call for roadmaps in the National Nanotechnology Initiative Strategic Plan, it is the first broad-based community effort to articulate the comprehensive needs and goals in nanoinformatics. The development and widespread adoption of advanced nanoinformatics capabilities that accelerate responsible research, development, and deployment of nanotechnology—driven by the expertise and momentum of the R&D community and enabled by the agencies that support it—is the ultimate goal of the Nanoinformatics 2020 Roadmap.
Also included: Carbon Nanotube-Polymer Multilayer Structures for Light Weight, Enhanced Shock Absorbing Materials, Responsible Development of Nanotechnology: Maximizing Results while Minimizing Risk, and Manufacturing Goes Vira
Regulating Tiny Technology: Preparing for Big Impacts on Innovation and Commercialization
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Deformation and Breakup of Micro- and Nanoparticle Stabilized Droplets in Microfluidic Extensional Flows
No full textUsing 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 microfluidic hyperbolic contraction. The shear resulted from droplet confinement and increased with droplet size and position along the hyperbolic contraction. Droplet deformation was found to increase with increasing confinement and capillary number. At low confinements and low capillary numbers, the droplet deformation followed the predictions of theory. For fully confined droplets, where the interface was populated by 1 mu m silica particles, the droplet deformation increased precipitously and two tails were observed to form at the rear of the droplet. These tails were similar to those seen for surfactant covered droplets. At a critical capillary number, daughter droplets were observed to stream from these tails. Due to the elasticity of the particle-laden interface, these drops did not return to a spherical shape, but were observed to buckle. Although increases in droplet deformation were observed, no tail streaming occurred for the 500 nm silica particle covered droplets over the range of capillary numbers studied
Electronic Microarrays in DNA Computing
No full textDNA Computing is a rapidly-developing interdisciplinary area which could benefit from more experimental results to solve practical problems with the current biological tools. In this study, we have integrated microelectronics and molecular biology techniques for the storage of information and basic arithmetic operations via DNA. Using 16 different complementary sequences of DNA, we stored 4 bits of information on an electronic microarray and read the data via the fluorescent signal strength coming from the microarray pads. We also showed the possibility of addition and subtraction of quantities of fluorescently tagged DNA determined via their fluorescent signal strength. We conclude that the hybrid technology we employed, based on a matured Si-CMOS platform, has the potential to strengthen the pursuit of DNA computation as well as finding its own niche applications
Supramolecular Functionalization of Electron-Beam Generated Nanostructures
No full textElectron-beam lithography was used to pattern poly(styrene-co-(methyldiaminotriazine) styrene) (PS-Triaz). These polymer nanopatterns were utilized as molecular scaffolds for assembling complementary thymine-functionalized CdSe-ZnS quantum dots (Thy-QDs) via three-point hydrogen-bonding molecular recognition. This interaction was very specific, with N-methyl thymine-functionalized QDs (MeThy-QDs) not depositing on the surfaces. The "lock and key" specificity of the assembly is mirrored in the disassembly process, where complete removal of the QD was observed using a competing thymine guest