InterNano Nanomanufacturing Repository
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Assessing the Economic Impact of Nanotechnology: The Role of Nanomanufacturing
No full textIn developing a strategy for the National Nanotechnology Initiative (NNI), the President’s Council of Advisors on Science and Technology (PCAST) have emphasized the need to enable more effective technology transfer and provide added focus on nanomanufacturing and commercialization. These objectives are intended to foster needed economic development within the U.S., while also providing a return on investment (ROI) for the federal government’s long-term support of the NNI. While various interpretations can be made from the PCAST reports’ (NNI report, Advanced Manufacturing Report) recommendations, one thing is very clear: the linkage between nanomanufacturing and commercialization. While the NNI’s investment has had a significant impact on our understanding of nanoscience, and has established the U.S. as the global leader in nanotechnology, nanomanufacturing represents the vehicle by which the innovations of the nanosciences will transition the valley of death towards new and enhanced consumer products.
Also included: Inkjet-Printed Graphene Flexible Electronics, Calculating the Cost of Advanced Manufacturing, and National Nanotechnology Coordination Office Welcomes New Directo
Designing Functional Inks for Directed Materials Assembly
No full textRecent advances in printed electronics by direct-write assembly of functional inks open new avenues for microscale patterning of conductive features, solar cell interconnects, and cathode/anode for microbatteries. We have developed a new class of silver-based reactive solution inks that are suitable for printing approaches, e.g. direct ink writing, inkjet, aerosol jet, and airbrush printing. These inks are devoid of particles and, hence, readily flow through ultrafine nozzles without clogging. We have demonstrated conductive silver traces (~ 5 m wide) using direct ink writing coupled with a flexible, nanoscale nozzle (100 nm in diameter) on silicon substrates, and flexible silver patterns using airbrushing on polymer substrates. Upon annealing at 90°C, the printed features exhibit an electrical conductivity analogous to that of bulk silver (6.3x105 S/cm)
Zero Mode Waveguide Studies of Single Enzyme Kinetics
No full textA good deal of effort has gone into defining the conditions under which single molecule spectroscopy can be used to study complex biochemical phenomena, such as enzyme dynamics. Furthermore, there is significant interest in understanding how biomolecules behave under conditions of crowding and confinement in the ultrasmall volumes relevant to nanomanufacturing. We have developed a new modality for zero-mode waveguide (ZMW) studies employing over-etched Au-based ZMWs, which have significant advantages relative to the more commonly encountered Al ZMWs. Furthermore, these platforms are applied to an intrinsically interesting system—the single enzyme dynamics of sarcosine oxidase—an enzyme important for bacterial energy management. Because we identify just those ZMWs that contain exactly one enzyme and because this enzyme is covalently attached to the SiO2 floor of the ZMW, one can readily imagine carrying out experiments where the interior structure of the pore can be modified to change the immediate environment of the enzyme molecule in a well-controlled manner. The spectroscopic results themselves speak to enzyme turnover rate distributions, static and dynamic heterogeneity and even allow measurement of off-time distributions for mismatched substrates, i.e. L-proline. Taken together these results point the way to realize a powerful new platform for spectroscopic studies of single enzyme dynamics
Quantum Dot Ribbons, Grids, and Complex Patterns Spanning Many Length Scales are Printed using Scalable Flow-Coating Methods
No full textFabrication of air gap dielectrics by nanoimprint lithography
No full textWe report a simple and high-resolution method to fabricate air gap dielectrics with well-defined geometries. This method utilizes nanoimprint lithography to pattern a thermally labile organic polymer, poly (2-hydroxyethyl methacrylate) (PHEMA), subsequently used as a sacrificial template to form air gap nanochannels in a low-k spin-on-glass, poly(methylsilsesquioxane) (PMSSQ). The morphology and dimensions of obtained structures were characterized by cross-sectional SEM, revealing well-defined, continuous and uniform nanochannels. Dielectric constant measurements showed that introduction of these air gap nanochannels into the PMSSQ layer decreased the dielectric constant value from 2.8 to 1.9, while nanoindentation experiments confirmed that the nanochannels were mechanically robust as the air gap films retained the hardness of 1 GPa. Infusion with a fluorescent dye solution and subsequent quenching with gold nanoparticles demonstrated continuous nature and uniform distribution of the nanochannels throughout the sample. (C) 2012 Elsevier B.V. All rights reserved
