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Investigators from University of Jyvaskyla Have Reported New Data on General Science

May 28, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Science. According to news reporting originating in Jyvaskyla, Finland, by VerticalNews journalists, research stated, "Controlling thermal transport has become relevant in recent years. Traditionally, this control has been achieved by tuning the scattering of phonons by including various types of scattering centres in the material (nanoparticles, impurities, etc)."

The news reporters obtained a quote from the research from the University of Jyvaskyla, "Here we take another approach and demonstrate that one can also use coherent band structure effects to control phonon thermal conductance, with the help of periodically nanostructured phononic crystals. We perform the experiments at low temperatures below 1K, which not only leads to negligible bulk phonon scattering, but also increases the wavelength of the dominant thermal phonons by more than two orders of magnitude compared to room temperature. Thus, phononic crystals with lattice constants >= 1 mu m are shown to strongly reduce the thermal conduction."

According to the news reporters, the research concluded: "The observed effect is in quantitative agreement with the theoretical calculation presented, which accurately determined the ballistic thermal conductance in a phononic crystal device."

For more information on this research see: Engineering thermal conductance using a two-dimensional phononic crystal. Nature Communications, 2014;5():177-185. Nature Communications can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Communications - www.nature.com/ncomms/)

Our news correspondents report that additional information may be obtained by contacting N. Zen, University of Jyvaskyla, Dept. of Phys, Nanosci Center, FIN-40014 Jyvaskyla, Finland. Additional authors for this research include T.A. Puurtinen, T.J. Isotalo, S. Chaudhuri and I.J. Maasilta.

Keywords for this news article include: Europe, Finland, Science, Jyvaskyla, Engineering

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


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Source: Journal of Engineering


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