Heat Conduction through a DNA−Gold Composite

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• 作者：Takashi Kodama ; Ankur Jain ; Kenneth E. Goodson
• 刊名：Nano Letters
• 出版年：2009
• 出版时间：May 13, 2009
• 年：2009
• 卷：9
• 期：5
• 页码：2005-2009
• 全文大小：224K
• 年卷期：v.9,no.5(May 13, 2009)
• ISSN：1530-6992

文摘

This paper reports results from electrical and thermal conduction measurements carried out on the DNA−gold composite for which the overall conduction is shown to be dominated by the DNA rather than the discontinuous gold coatings. The electrical and thermal conductivities of the composite were about 14 S/cm and 150 W/(m K) at room temperature, respectively. The resulting value of 3.6 × 10⁻⁴ W Ω/K² for the Lorentz number indicates that thermal transport in the DNA is phonon-dominated and that the molecular vibrations play a key role in both electrical and thermal conduction processes of DNA molecules.