By a News Reporter-Staff News Editor at Science Letter -- New research on Nanocrystals is the subject of a report. According to news reporting from Berkeley, California, by NewsRx journalists, research stated, "A quantitative understanding of nanocrystal phase transformations would enable more efficient energy conversion and catalysis, but has been hindered by difficulties in directly monitoring well-characterized nanoscale systems in reactive environments. We present a new in situ luminescence-based probe enabling direct quantification of nanocrystal phase transformations, applied here to the hydriding transformation of palladium nanocrystals."
The news correspondents obtained a quote from the research from the University of California, "Our approach reveals the intrinsic kinetics and thermodynamics of nanocrystal phase transformations, eliminating complications of substrate strain, ligand effects and external signal transducers. Clear size-dependent trends emerge in nanocrystals long accepted to be bulk-like in behaviour. Statistical mechanical simulations show these trends to be a consequence of nanoconfinement of a thermally driven, first-order phase transition: near the phase boundary, critical nuclei of the new phase are comparable in size to the nanocrystal itself. Transformation rates are then unavoidably governed by nanocrystal dimensions."
According to the news reporters, the research concluded: "Our results provide a general framework for understanding how nanoconfinement fundamentally impacts broad classes of thermally driven solid-state phase transformations relevant to hydrogen storage, catalysis, batteries and fuel cells."
For more information on this research see: Uncovering the intrinsic size dependence of hydriding phase transformations in nanocrystals. Nature Materials, 2013;12(10):905-912. Nature Materials can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Materials - www.nature.com/nmat/)
Our news journalists report that additional information may be obtained by contacting R. Bardhan, University of California, Berkeley Sensor & Actuator Center, Berkeley, CA 94720, United States. Additional authors for this research include L.O. Hedges, C.L. Pint, A. Javey, S. Whitelam and J.J. Urban (see also Nanocrystals).
Keywords for this news article include: Berkeley, California, United States, Nanotechnology, Emerging Technologies, North and Central America
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