Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires

Jong Wook Roh, Kedar Hippalgaonkar, Jin Hee Ham, Renkun Chen, Ming Zhi Li, Peter Ercius, Arun Majumdar, Woochul Kim, Wooyoung Lee

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The thermal conductivity of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires (ON-OFF) has been investigated. We observed that the thermal conductivity of single-crystalline Bi nanowires is highly anisotropic. Thermal conductivity of nanowires (diameter ∼100 nm) in the off-axis [1̄02] and [110] directions exhibits a difference of ∼7.0 W/m·K. The thermal conductivity in both growth directions is diameter-dependent, which indicates that thermal transport through the individual Bi nanowires is limited by boundary scattering of both electrons and phonons. This huge anisotropy in thermal conductivities of Bi nanowires suggests the importance of direction-dependent characterization of charge, thermal transport, and thermoelectric properties of Bi nanowires.

Original languageEnglish
Pages (from-to)3954-3960
Number of pages7
JournalACS Nano
Volume5
Issue number5
DOIs
Publication statusPublished - 2011 May 24

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Bismuth
bismuth
Nanowires
Thermal conductivity
Anisotropy
nanowires
thermal conductivity
Crystalline materials
anisotropy
Phonons
phonons
Scattering
Electrons
scattering
Direction compound

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Roh, J. W., Hippalgaonkar, K., Ham, J. H., Chen, R., Li, M. Z., Ercius, P., ... Lee, W. (2011). Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires. ACS Nano, 5(5), 3954-3960. https://doi.org/10.1021/nn200474d
Roh, Jong Wook ; Hippalgaonkar, Kedar ; Ham, Jin Hee ; Chen, Renkun ; Li, Ming Zhi ; Ercius, Peter ; Majumdar, Arun ; Kim, Woochul ; Lee, Wooyoung. / Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires. In: ACS Nano. 2011 ; Vol. 5, No. 5. pp. 3954-3960.
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Roh, JW, Hippalgaonkar, K, Ham, JH, Chen, R, Li, MZ, Ercius, P, Majumdar, A, Kim, W & Lee, W 2011, 'Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires', ACS Nano, vol. 5, no. 5, pp. 3954-3960. https://doi.org/10.1021/nn200474d

Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires. / Roh, Jong Wook; Hippalgaonkar, Kedar; Ham, Jin Hee; Chen, Renkun; Li, Ming Zhi; Ercius, Peter; Majumdar, Arun; Kim, Woochul; Lee, Wooyoung.

In: ACS Nano, Vol. 5, No. 5, 24.05.2011, p. 3954-3960.

Research output: Contribution to journalArticle

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AU - Li, Ming Zhi

AU - Ercius, Peter

AU - Majumdar, Arun

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Roh JW, Hippalgaonkar K, Ham JH, Chen R, Li MZ, Ercius P et al. Observation of anisotropy in thermal conductivity of individual single-crystalline bismuth nanowires. ACS Nano. 2011 May 24;5(5):3954-3960. https://doi.org/10.1021/nn200474d