Thermal and electrical conduction in 6.4 nm thin gold films

被引：34

作者：

Lin, Huan ^{[1
,2
]}

Xu, Shen ^{[1
]}

Li, Chong ^{[1
]}

Dong, Hua ^{[3
]}

Wang, Xinwei ^{[1
,3
]}

机构：

[1] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA

[2] Ocean Univ China, Coll Engn, Qingdao 266100, Shandong, Peoples R China

[3] Qingdao Technol Univ, Sch Environm & Municipal Engn, Qingdao 266033, Shandong, Peoples R China

来源：

NANOSCALE | 2013年 / 5卷 / 11期

基金：

美国国家科学基金会;

关键词：

METAL-FILMS; POLYCRYSTALLINE FILMS; EXTERNAL SURFACES; RESISTIVITY MODEL; REFLECTION; TRANSPORT;

D O I：

10.1039/c3nr00729d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

For sub-10 nmthinmetallic films, very little knowledge is available so far on how electron scattering at surface and grain boundaries reduces the thermal transport. This work reports on the first time characterization of the thermal and electrical conductivities of gold films of 6.4 nm average thickness. The electrical (sigma) and thermal (k) conductivities of the Au film are found to be reduced dramatically from their bulk counterparts by 93.7% (sigma) and 80.5% (k). Its Lorenz number is measured as 7.44 x 10(-8) W Omega K-2, almost a twofold increase from the bulk value. The Mayadas-Shatzkes model is used to interpret the experimental results and reveals very strong electron reflection (77%) at grain boundaries.

引用

页码：4652 / 4656

页数：5

共 29 条

[1]

[Anonymous], 2007, Introduction to Heat Transfer

[2] Thermal transport in granular metals [J].

Beloborodov, IS ;

Lopatin, AV ;

Hekking, FWJ ;

Fazio, R ;

Vinokur, VM .

EUROPHYSICS LETTERS, 2005, 69 (03) :435-441

[3] Thermo-physical properties of thin films composed of anatase TiO2 nanofibers [J].

Feng, X. ;

Wang, X. ;

Chen, X. ;

Yue, Y. .

ACTA MATERIALIA, 2011, 59 (05) :1934-1944

[4] Thermal conductivity and secondary porosity of single anatase TiO2 nanowire [J].

Feng, Xuhui ;

Huang, Xiaopeng ;

Wang, Xinwei .

NANOTECHNOLOGY, 2012, 23 (18)

[5] Thermophysical properties of free-standing micrometer-thick Poly (3-hexylthiophene) films [J].

Feng, Xuhui ;

Wang, Xinwei .

THIN SOLID FILMS, 2011, 519 (16) :5700-5705

[6] LATTICE THERMAL CONDUCTIVITY OF SOME PALLADIUM AND PLATINUM ALLOYS [J].

FLETCHER, R ;

GREIG, D .

PHILOSOPHICAL MAGAZINE, 1967, 16 (140) :303-&

[7] The conductivity of thin metallic films according to the electron theory of metals [J].

Fuchs, K .

PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY, 1938, 34 :100-108

[8] Thermal characterization of microscale conductive and nonconductive wires using transient electrothermal technique [J].

Guo, Jiaqi ;

Wang, Xinwei ;

Wang, Tao .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (06)

[9] Transient thermal characterization of micro/submicroscale polyacrylonitrile wires [J].

Guo, Jiaqi ;

Wang, Xinwei ;

Zhang, Lijun ;

Wang, Tao .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2007, 89 (01) :153-156

[10] Size effect on the thermal conductivity of thin metallic films investigated by scanning joule expansion microscopy [J].

Gurrum, Siva P. ;

King, William P. ;

Joshi, Yogendra K. ;

Ramakrishna, Koneru .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2008, 130 (08)

← 1 2 3 →