Relaxation of vibrational energy in fullerene suspensions

Scott T. Huxtable; David G. Cahill; Sergei Shenogin; Pawel Keblinski

doi:10.1016/j.cplett.2005.03.052

Relaxation of vibrational energy in fullerene suspensions

Scott T. Huxtable, David G. Cahill, Sergei Shenogin, Pawel Keblinski

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Abstract

Picosecond transient absorption is used to measure the thermal decay time of a mixture of higher-order fullerenes suspended in chloroform, toluene, and carbon disulfide. The relaxation time is ≈40 ps, which translates into a small effective interface conductance, G ≈ 14 MW m^-2 K ^-1. Molecular dynamics simulations of a fullerene molecule suspended in octane agree with experiment (G ≈ 10 MW m^-2 K^-1) and support the conclusion that the 40 ps decay time results from the relaxation of vibrational energy and not the relaxation of electronic excitations.

Original language	English (US)
Pages (from-to)	129-134
Number of pages	6
Journal	Chemical Physics Letters
Volume	407
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2005.03.052
State	Published - May 17 2005

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2005.03.052

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title = "Relaxation of vibrational energy in fullerene suspensions",

abstract = "Picosecond transient absorption is used to measure the thermal decay time of a mixture of higher-order fullerenes suspended in chloroform, toluene, and carbon disulfide. The relaxation time is ≈40 ps, which translates into a small effective interface conductance, G ≈ 14 MW m-2 K -1. Molecular dynamics simulations of a fullerene molecule suspended in octane agree with experiment (G ≈ 10 MW m-2 K-1) and support the conclusion that the 40 ps decay time results from the relaxation of vibrational energy and not the relaxation of electronic excitations.",

author = "Huxtable, {Scott T.} and Cahill, {David G.} and Sergei Shenogin and Pawel Keblinski",

note = "Funding Information: We thank Zhenbin Ge for carrying out the centrifuge experiments. This work was supported by DOE Grant No. DEFG02-01ER45938. Sample characterization used the facilities of the Center for Microanalysis of Materials, which is partially supported by the US Department of Energy under Grant No. DEFG02-91-ER45439. Optical measurements were performed in the Laser Facility of the Seitz Materials Research Laboratory. Work of P.K. and S.S. was supported by DOE Grant No. DE-FG02-04ER46104, and a grant from Phillip Morris, USA. ",

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AU - Huxtable, Scott T.

AU - Cahill, David G.

AU - Shenogin, Sergei

AU - Keblinski, Pawel

N1 - Funding Information: We thank Zhenbin Ge for carrying out the centrifuge experiments. This work was supported by DOE Grant No. DEFG02-01ER45938. Sample characterization used the facilities of the Center for Microanalysis of Materials, which is partially supported by the US Department of Energy under Grant No. DEFG02-91-ER45439. Optical measurements were performed in the Laser Facility of the Seitz Materials Research Laboratory. Work of P.K. and S.S. was supported by DOE Grant No. DE-FG02-04ER46104, and a grant from Phillip Morris, USA.

PY - 2005/5/17

Y1 - 2005/5/17

N2 - Picosecond transient absorption is used to measure the thermal decay time of a mixture of higher-order fullerenes suspended in chloroform, toluene, and carbon disulfide. The relaxation time is ≈40 ps, which translates into a small effective interface conductance, G ≈ 14 MW m-2 K -1. Molecular dynamics simulations of a fullerene molecule suspended in octane agree with experiment (G ≈ 10 MW m-2 K-1) and support the conclusion that the 40 ps decay time results from the relaxation of vibrational energy and not the relaxation of electronic excitations.

AB - Picosecond transient absorption is used to measure the thermal decay time of a mixture of higher-order fullerenes suspended in chloroform, toluene, and carbon disulfide. The relaxation time is ≈40 ps, which translates into a small effective interface conductance, G ≈ 14 MW m-2 K -1. Molecular dynamics simulations of a fullerene molecule suspended in octane agree with experiment (G ≈ 10 MW m-2 K-1) and support the conclusion that the 40 ps decay time results from the relaxation of vibrational energy and not the relaxation of electronic excitations.

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JF - Chemical Physics Letters

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Relaxation of vibrational energy in fullerene suspensions

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