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Photoactive Porous Silicon Nanopowder
ACS Applied Materials & Interfaces, 2013Bulk processing of porous silicon nanoparticles (nSi) of 50-300 nm size and surface area of 25-230 m(2)/g has been developed using a combustion synthesis method. nSi exhibits consistent photoresponse to AM 1.5 simulated solar excitation. In confirmation of photoactivity, the films of nSi exhibit prompt bleaching following femtosecond laser pulse ...
Benjamin H, Meekins +6 more
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Ignition and explosion risks of nanopowders
Journal of Hazardous Materials, 2010Characterization methods with regard to nanopowder flammability and explosivity are presented and illustrated for few nanopowders. Analytical models are developed in order to explain the dependency of the combustion times on the particle diameter.
Bouillard, J. +4 more
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Redispersity/Solubility of Nanopowder in Solvents
Recent Patents on Nanotechnology, 2014Because of the high surface energy, nanoparticles show strong tendency to agglomeration or aggregation during preparations and applications, which thus greatly deteriorate their performance. Investigations have proven that redispersible nanoparticles can exhibit enhanced performances or be used in new technical applications as compared with the non ...
Yunan, Zhao +3 more
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Production of Metal Nanopowders by Sonoelectrochemistry
MRS Proceedings, 1994AbstractMetal powders with a diameter ranging from 20 to 50 micrometers are currently produced by electrolysis at high current density in aqueous electrolytes. A lot of research is then devoted to produce by electrolysis and with a high yield, ultrafine metal powders.
Delplancke, Jean-Luc +3 more
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In Vitro Evaluation of Zirconia Nanopowders
Key Engineering Materials, 2003ZrO2 is used for a long time as biomaterial. Nanopowders of ZrO2 are prepared via a microwave assisted hydrothermal synthesis and morphological studies carried out by TEM. The powders are tested in vitro and this test does not alter the dimension of the particles.
S. Braccini +4 more
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Oxidation and Melting of Aluminum Nanopowders
The Journal of Physical Chemistry B, 2006Recently, nanometer-sized aluminum powders became available commercially, and their use as potential additives to propellants, explosives, and pyrotechnics has attracted significant interest. It has been suggested that very low melting temperatures are expected for nanosized aluminum powders and that such low melting temperatures could accelerate ...
Mikhaylo A, Trunov +4 more
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Fire and Explosion of Nanopowders
2015This chapter explores the explosion characteristics of nanopowders. Combustible nanopowders have a high likelihood of explosion because of their high specific surface and low threshold limits of ignition energy conditions (high sensitivity) compared to their microscaled counterparts. It is shown that the explosion severity of combustible nanopowders is
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Glass and bioglass nanopowders by flame synthesis
Chemical Communications, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Brunner, Tobias J. +2 more
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2013
Gas-fluidized beds of some nanopowders exhibit a nonbubbling fluid-like behavior as seen for conditioned fine powders. For example, powders of moderate density nanoparticles, such as silica nanoparticles, can be fluidized by a gas in a nonbubbling fluid-like regime.
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Gas-fluidized beds of some nanopowders exhibit a nonbubbling fluid-like behavior as seen for conditioned fine powders. For example, powders of moderate density nanoparticles, such as silica nanoparticles, can be fluidized by a gas in a nonbubbling fluid-like regime.
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Spectroscopy of Eu:YAG nanopowders
physica status solidi c, 2007AbstractYAG:Eu nanopowders were synthesized by a nitrate‐citrate sol‐gel method. The morphologic modifications produced by thermal treatments at various temperatures were monitored by a series of parameters obtained from the optical fluorescence spectroscopy: intensity ratio of the transitions 5D0 → 7F2 and 5D0 → 7F1, the maximum splitting of the 7F1 ...
S. Georgescu +3 more
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