Direct evaluation of ballistic phonon transport in a multi-walled carbon nanotube

Hiroyuki Hayashi; Koji Takahashi; Tatsuya Ikuta; Takashi Nishiyama; Yasuyuki Takata; Xing Zhang

doi:10.1063/1.4869470

Direct evaluation of ballistic phonon transport in a multi-walled carbon nanotube

Hiroyuki Hayashi, Koji Takahashi, Tatsuya Ikuta, Takashi Nishiyama, Yasuyuki Takata, Xing Zhang

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Phonon confinement and in situ thermal conductance measurements in an individual multi-walled carbon nanotube (MWNT) are reported. Focused ion beam (FIB) irradiation was used to successively shorten a 4.8 μm long MWNT, eventually yielding a 0.3 μm long MWNT. After the first FIB irradiation, a 41% reduction in conductance was achieved, compared with that of the pristine MWNT. This was because the contributions from phonons with long free paths were excluded by scattering at FIB-induced defects. Phonon transport in linked multiple-length nanotubes was also investigated.

Original language	English
Article number	113112
Journal	Applied Physics Letters
Volume	104
Issue number	11
DOIs	https://doi.org/10.1063/1.4869470
Publication status	Published - Mar 17 2014

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4869470

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AU - Hayashi, Hiroyuki

AU - Takahashi, Koji

AU - Ikuta, Tatsuya

AU - Nishiyama, Takashi

AU - Takata, Yasuyuki

AU - Zhang, Xing

PY - 2014/3/17

Y1 - 2014/3/17

N2 - Phonon confinement and in situ thermal conductance measurements in an individual multi-walled carbon nanotube (MWNT) are reported. Focused ion beam (FIB) irradiation was used to successively shorten a 4.8 μm long MWNT, eventually yielding a 0.3 μm long MWNT. After the first FIB irradiation, a 41% reduction in conductance was achieved, compared with that of the pristine MWNT. This was because the contributions from phonons with long free paths were excluded by scattering at FIB-induced defects. Phonon transport in linked multiple-length nanotubes was also investigated.

AB - Phonon confinement and in situ thermal conductance measurements in an individual multi-walled carbon nanotube (MWNT) are reported. Focused ion beam (FIB) irradiation was used to successively shorten a 4.8 μm long MWNT, eventually yielding a 0.3 μm long MWNT. After the first FIB irradiation, a 41% reduction in conductance was achieved, compared with that of the pristine MWNT. This was because the contributions from phonons with long free paths were excluded by scattering at FIB-induced defects. Phonon transport in linked multiple-length nanotubes was also investigated.

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Direct evaluation of ballistic phonon transport in a multi-walled carbon nanotube

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