InterNano Nanomanufacturing Repository
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Mesoporous silica/nanoparticle composites prepared by 3-D replication of highly filled block copolymer templates
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Doping of TiO2 nanopowders with vanadium for the reduction of its band gap reaching the visible light spectrum region
No full textSynthesis of tungsten oxide nanoparticles using a hydrothermal method at ambient pressure
No full textTungsten oxide (WO3) nanostructures receive sustained interest for a wide variety of applications, and especially for its usage as a photocatalyst. It is therefore important to find suitable methods allowing for its easy and inexpensive large scale production. Tungstite (WO3 center dot H2O) nanoparticles were synthesized using a simple and inexpensive low temperature and low pressure hydrothermal (HT) method. The precursor solution used for the HT process was prepared by adding hydrochloric acid to diluted sodium tungstate solutions (Na2WO4 center dot 2H(2)O) at temperatures below 5 degrees C and then dissolved using oxalic acid. This HT process yielded tungstite (WO3 center dot H2O) nanoparticles with the orthorhombic structure. A heat treatment at temperatures at or above 300 degrees C resulted in a phase transformation to monoclinic WO3, while preserving the nanoparticles morphology. The production of WO3 nanoparticles using this method is therefore a three step process: protonation of tungstate ions, crystallization of tungstite, and phase transformation to WO3. Furthermore, this process can be tailored. For example, we show that WO3 can be doped with cesium and that nanorods can also be obtained. The products were characterized using powder x-ray diffraction, transmission electron microscopy (including electron energy-loss spectroscopy and electron diffraction), and x-ray photoelectron spectroscopy
Antimicrobial N-halamine Modified Polyethylene: Characterization, Biocidal Efficacy, Regeneration, and Stability
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2014 National Nanotechnology Initiative Strategic Plan
No full textThis document updates and replaces the prior NNI Strategic Plan released in February of 2011. As called for in the 21st Century Nanotechnology Research and Development Act (Public Law 108-153, 15 USC §7501), the NNI Strategic Plan describes the NNI vision and goals and the strategies by which these goals are to be achieved, including specific objectives within each of the goals. Also as called for in the Act, the Plan describes the NNI investment strategy and the investment categories, known as the program component areas (PCAs), used in the annual NNI budget crosscut
Progress Review on the Coordinated Implementation of the National Nanotechnology Initiative 2011 Environmental, Health, and Safety Research Strategy
No full textThis document provides an overview of progress on the implementation and coordination of the 2011 NNI Environmental, Health, and Safety (EHS) Research Strategy that was developed by the Nanoscale Science, Engineering, and Technology Subcommittee’s Nanotechnology Environmental and Health Implications (NEHI) Working Group. Consistent with the adaptive management process described in this strategy, the NEHI Working Group has made significant progress through the use of various evaluation tools to understand the current status of nanotechnology-related EHS (nanoEHS) research and the Federal nanoEHS research investment
