Reduction of lattice thermal conductivity in single Bi-Te core/shell nanowires with rough interface

Joohoon Kang, Jong Wook Roh, Wooyoung Shim, Jinhee Ham, Jin Seo Noh, Wooyoung Lee

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The role of the interface roughness of Bi-Te core/shell nanowires is reported in reducing lattice thermal conductivity, which are prepared by on-film formation of nanowire (OFF-ON) that is capable of growing high-quality single-crystalline Bi nanowires, and by the subsequent sputtering of Te onto the Bi nanowires. The rough interface Bi-Te core/shell nanowires exhibit lower thermal conductivities than that of smooth interface counterparts, while electrical conductivities for these two types of nanowires are similar. We propose that the rough interface plays a pivotal role in suppressing phonon transport, which in turn, reduces thermal conductivity significantly.

Original languageEnglish
Pages (from-to)3414-3419
Number of pages6
JournalAdvanced Materials
Volume23
Issue number30
DOIs
Publication statusPublished - 2011 Aug 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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