Please use this identifier to cite or link to this item: https://doi.org/10.1021/nl403750s
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dc.titleExtreme low thermal conductivity in nanoscale 3D Si phononic crystal with spherical pores
dc.contributor.authorYang, L.
dc.contributor.authorYang, N.
dc.contributor.authorLi, B.
dc.date.accessioned2014-10-16T09:25:08Z
dc.date.available2014-10-16T09:25:08Z
dc.date.issued2014-04-09
dc.identifier.citationYang, L., Yang, N., Li, B. (2014-04-09). Extreme low thermal conductivity in nanoscale 3D Si phononic crystal with spherical pores. Nano Letters 14 (4) : 1734-1738. ScholarBank@NUS Repository. https://doi.org/10.1021/nl403750s
dc.identifier.issn15306992
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/96583
dc.description.abstractIn this work, we propose a nanoscale three-dimensional (3D) Si phononic crystal (PnC) with spherical pores, which can reduce the thermal conductivity of bulk Si by a factor up to 10,000 times at room temperature. Thermal conductivity of Si PnCs depends on the porosity, for example, the thermal conductivity of Si PnCs with porosity 50% is 300 times smaller than that of bulk Si. The phonon participation ratio spectra demonstrate that more phonons are localized as the porosity increases. The thermal conductivity is insensitive to the temperature changes from room temperature to 1100 K. The extreme-low thermal conductivity could lead to a larger value of ZT than unity as the periodic structure affects very little the electric conductivity. © 2014 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/nl403750s
dc.sourceScopus
dc.subjectmolecular dynamics
dc.subjectphonon localization
dc.subjectPhononic crystal
dc.subjectthermal conductivity
dc.subjectthermoelectric material
dc.subjectthermoelectrics
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1021/nl403750s
dc.description.sourcetitleNano Letters
dc.description.volume14
dc.description.issue4
dc.description.page1734-1738
dc.description.codenNALEF
dc.identifier.isiut000334572400007
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