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Issue 37, 2018, Issue in Progress
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Essential role of enhanced surface electron–phonon interactions on the electrical transport of suspended polycrystalline gold nanofilms

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Abstract

The electrical resistivity of suspended polycrystalline gold nanofilms with different lengths has been measured over the temperature range of 2 K to 340 K, which dramatically increases compared with bulk gold and slightly increases with length. Classical size effect theories considering surface and grain boundary scatterings cannot explain the increased film resistivity, especially the temperature dependence of resistivity, over the whole temperature range. Considering the fact that the reduction of the coordination number of atoms at the surface and the interface leads to a decrease of the phonon spectrum frequency and consequently affects the surface phonon spectrum, the electron–phonon interaction as a relatively independent surface effect is taken into account. The theoretical predictions and the experimental measured film resistivity match very well over the whole temperature range and the extracted surface Debye temperature decreases significantly compared to the bulk value, which illustrates the essential role of enhanced surface electron–phonon interactions on the electrical transport of the present gold nanofilms.

Graphical abstract: Essential role of enhanced surface electron–phonon interactions on the electrical transport of suspended polycrystalline gold nanofilms

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Article information


Submitted
26 Feb 2018
Accepted
27 May 2018
First published
06 Jun 2018

This article is Open Access

RSC Adv., 2018,8, 20679-20685
Article type
Paper

Essential role of enhanced surface electron–phonon interactions on the electrical transport of suspended polycrystalline gold nanofilms

T. Miao, D. Li, S. Shi, Z. Ji, W. Ma, X. Zhang, Q. Zhong and X. Wang, RSC Adv., 2018, 8, 20679
DOI: 10.1039/C8RA01699B

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