Template-free Synthesis and Transport Properties of Bi2Te3 Ordered Nanowire Arrays via a Physical Vapor Process

被引：32

作者：

Deng, Yuan ^{[1
]}

Xiang, Yan ^{[1
]}

Song, Yuanzeng ^{[1
]}

机构：

[1] Beihang Univ, Sch Chem & Enviromn, Beijing 100191, Peoples R China

来源：

CRYSTAL GROWTH & DESIGN | 2009年 / 9卷 / 07期

基金：

中国国家自然科学基金;

关键词：

THERMOELECTRIC FIGURE; TEMPERATURE;

D O I：

10.1021/cg800808u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bi2Te3 thin films, composed of ordered nanowire arrays, have been successfully fabricated by a convenient physical vapor deposition method without using any template. The composition and microstructure of these films were determined by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM). The effects of deposition rate, substrate temperature, and deposition time on morphologies of Bi2Te3 films were investigated. The effects of morphology of film on the electrical conductivity and Seebeck coefficient were also studied. The results show that the nanowire arrays are composed of single-crystalline Bi2Te3 nanowires with diameters of about 18 nm. The nanowires are parallel to each other and uniformly distributed. The film of nanowire arrays shows good transport properties. The growth mechanism of such nanostructure was proposed.

引用

页码：3079 / 3082

页数：4

共 24 条

[1] BINDING AND DIFFUSION OF A SI ADATOM ON THE SI(100) SURFACE [J].

BROCKS, G ;

KELLY, PJ ;

CAR, R .

PHYSICAL REVIEW LETTERS, 1991, 66 (13) :1729-1732

[2] Recent developments in thermoelectric materials [J].

Chen, G ;

Dresselhaus, MS ;

Dresselhaus, G ;

Fleurial, JP ;

Caillat, T .

INTERNATIONAL MATERIALS REVIEWS, 2003, 48 (01) :45-66

[3] A novel approach to Bi2Te3 nanorods by controlling oriented attachment [J].

Deng, Y ;

Nan, CW ;

Guo, L .

CHEMICAL PHYSICS LETTERS, 2004, 383 (5-6) :572-576

[4] Ligand-assisted control growth of chainlike nanocrystals [J].

Deng, Y ;

Wei, GD ;

Nan, CW .

CHEMICAL PHYSICS LETTERS, 2003, 368 (5-6) :639-643

[5] Nanowires and nanotubes [J].

Dresselhaus, MS ;

Lin, YM ;

Rabin, O ;

Jorio, A ;

Souza, AG ;

Pimenta, MA ;

Saito, R ;

Samsonidze, GG ;

Dresselhaus, G .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2003, 23 (1-2) :129-140

[6] Effects of wetting and misfit strain on the pattern formation of heteroepitaxially grown thin films [J].

Guo, J. Y. ;

Zhang, Y. W. ;

Lu, C. .

COMPUTATIONAL MATERIALS SCIENCE, 2008, 44 (01) :174-179

[7] Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit [J].

Hicks, LD ;

Harman, TC ;

Sun, X ;

Dresselhaus, MS .

PHYSICAL REVIEW B, 1996, 53 (16) :10493-10496

[8] THERMOELECTRIC FIGURE OF MERIT OF A ONE-DIMENSIONAL CONDUCTOR [J].

HICKS, LD ;

DRESSELHAUS, MS .

PHYSICAL REVIEW B, 1993, 47 (24) :16631-16634

[9] Composite nanotubes formed by self-assembly of PbS nanoparticles [J].

Leontidis, E ;

Orphanou, M ;

Kyprianidou-Leodidou, T ;

Krumeich, F ;

Caseri, W .

NANO LETTERS, 2003, 3 (04) :569-572

[10] Theoretical investigation of thermoelectric transport properties of cylindrical Bi nanowires [J].

Lin, YM ;

Sun, XZ ;

Dresselhaus, MS .

PHYSICAL REVIEW B, 2000, 62 (07) :4610-4623

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