Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Thermal Conductivity in Individual Single-Crystalline PbTe Nanowires

단결정 PbTe 단일 나노선의 열전도도

  • Roh, Jong Wook (Department of Materials Science and Engineering, Yonsei University) ;
  • Jang, So Young (Department of Chemistry, Korea University) ;
  • Kang, Joohoon (Department of Materials Science and Engineering, Yonsei University) ;
  • Lee, Seunghyun (Department of Materials Science and Engineering, Yonsei University) ;
  • Noh, Jin-Seo (Department of Materials Science and Engineering, Yonsei University) ;
  • Park, Jeunghee (Department of Chemistry, Korea University) ;
  • Lee, Wooyoung (Department of Materials Science and Engineering, Yonsei University)
  • 노종욱 (연세대학교 신소재공학과) ;
  • 장소영 (고려대학교 신소재화학과) ;
  • 강주훈 (연세대학교 신소재공학과) ;
  • 이승현 (연세대학교 신소재공학과) ;
  • 노진서 (연세대학교 신소재공학과) ;
  • 박정희 (고려대학교 신소재화학과) ;
  • 이우영 (연세대학교 신소재공학과)
  • Received : 2009.11.16
  • Published : 2010.02.20
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Abstract

We investigated the thermal conductivity of individual single-crystalline PbTe nanowires grown by chemical vapor transport method. Suspended MEMS was utilized to precisely measure the thermal conductivity of an individual nanowire. The thermal conductivity of a PbTe nanowire with diameter of 292 nm was measured to be $1.8W/m{\cdot}K$ at 300 K, which is about two thirds of that of bulk PbTe. This result indicates that the thermal conduction through a PbTe nanowire is effectively suppressed by the enhanced phonon boundary scattering. As the diameter of a PbTe nanowire decreases, the corresponding thermal conductivity linearly decreases.

Keywords

Acknowledgement

Supported by : 한국연구재단

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