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New Nanowires Study Findings Have Been Reported by Researchers at Sandia National Laboratories (Thermal boundary conductance between Al films and GaN...

July 15, 2014



New Nanowires Study Findings Have Been Reported by Researchers at Sandia National Laboratories (Thermal boundary conductance between Al films and GaN nanowires investigated with molecular dynamics)

By a News Reporter-Staff News Editor at Physics Week -- A new study on Nanowires is now available. According to news reporting originating from Livermore, California, by VerticalNews correspondents, research stated, "GaN nanowires are being pursued for optoelectronic and high-power applications. In either use, increases in operating temperature reduce both performance and reliability making it imperative to minimize thermal resistances."

Our news editors obtained a quote from the research from Sandia National Laboratories, "Since interfaces significantly influence the thermal response of nanosystems, the thermal boundary resistance between GaN nanowires and metal contacts has major significance. In response, we have performed systematic molecular dynamics simulations to study the thermal boundary conductance between GaN nanowires and Al films as a function of nanowire dimensions, packing density, and the depth the nanowire is embedded into the metal contact. At low packing densities, the apparent Kapitza conductance between GaN nanowires and an aluminum film is shown to be larger than when contact is made between films of these same materials. This enhancement decreases toward the film-film limit, however, as the packing density increases."

According to the news editors, the research concluded: "For densely packed nanowires, maximizing the Kapitza conductance can be achieved by embedding the nanowires into the films, as the conductance is found to be proportional to the total contact area."

For more information on this research see: Thermal boundary conductance between Al films and GaN nanowires investigated with molecular dynamics. Physical Chemistry Chemical Physics, 2014;16(20):9403-10. (Royal Society of Chemistry - www.rsc.org/; Physical Chemistry Chemical Physics - pubs.rsc.org/en/journals/journalissues/cp)

The news editors report that additional information may be obtained by contacting X.W. Zhou, Mechanics of Materials Department, Sandia National Laboratories, Livermore, California 94550, United States. Additional authors for this research include R.E. Jones, P.E. Hopkins and T.E Beechem.

Keywords for this news article include: Physics, Livermore, California, United States, Nanotechnology, Molecular Dynamics, Emerging Technologies, North and Central America.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Physics Week


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