Synthesis and characterization of Sb2Te3 nanofilms via electrochemical co-deposition method

被引:46
作者
Erdogan, Ibrahim Y. [1 ]
Demir, Uemit [1 ]
机构
[1] Ataturk Univ, Fac Sci, Dept Chem, TR-25240 Erzurum, Turkey
关键词
Sb2Te3; Co-deposition; Electrodeposition; Nanofilm; Underpotential deposition; Quantum confinement effect; Band gap; ATOMIC LAYER EPITAXY; THIN-FILMS; UNDERPOTENTIAL DEPOSITION; THERMOELECTRIC-MATERIALS; GROWTH; AU(111); ECALE; ELECTRODEPOSITION; MONOLAYERS; SUBSTRATE;
D O I
10.1016/j.jelechem.2009.06.010
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Nanofilms of Sb2Te3 were electrodeposited on Au (1 1 1) substrates using a practical electrochemical method, based on the simultaneous underpotential deposition (UPD) of Sb and Te from the same solution containing SbO+, and HTeO2 at a constant potential. Sb2Te3 nanofilms were characterized by X-ray diffraction (XRD). scanning tunneling microscopy (STM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS) and reflection absorption-FTIR (RA-FTIR). Results indicate that the growth of Sb2Te3 thin films follows the nucleation and three-dimensional (3D) growth mechanism resulting in high crystalline films of Sb2Te3 (1 1 0) in hexagonal structure, which were grown at a kinetically preferred orientation at (1 1 0) on Au (1 1 1). EDS analyses of the films confirm that Sb and Te are present tit an approximately 2:3 atomic ratio. The quantum-confined effect of the Sb2Te3 nanofilms is confirmed by the RA-FTIR measurements. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:253 / 258
页数:6
相关论文
共 32 条
[1]  
[Anonymous], J CHEM SOC P2
[2]   Influence of grain size on the electrical properties of Sb2Te3 polycrystalline films [J].
Arun, P ;
Vedeshwar, AG .
MATERIALS RESEARCH BULLETIN, 2003, 38 (15) :1929-1938
[3]  
Bard A. J., 1985, STANDARD POTENTIALS, P292
[4]   A SCANNING-TUNNELING-MICROSCOPY STUDY OF ELECTROCHEMICALLY GROWN CADMIUM-SULFIDE MONOLAYERS ON AU(111) [J].
DEMIR, U ;
SHANNON, C .
LANGMUIR, 1994, 10 (08) :2794-2799
[5]   Thermoelectric cooling and power generation [J].
DiSalvo, FJ .
SCIENCE, 1999, 285 (5428) :703-706
[6]   Characterization of size-quantized PbTe thin films synthesized by an electrochemical co-deposition method [J].
Erdogan, Ibrahim Y. ;
Oznuluer, Tuba ;
Bulbul, Ferhat ;
Demir, Uemit .
THIN SOLID FILMS, 2009, 517 (18) :5419-5424
[7]   AC conductivity and dielectric properties of Sb2Te3 thin films [J].
Farid, AM ;
Atyia, HE ;
Hegab, NA .
VACUUM, 2005, 80 (04) :284-294
[8]   Atomic layer epitaxy of CdTe using an automated electrochemical thin-layer flow deposition reactor [J].
Flowers, BH ;
Wade, TL ;
Garvey, JW ;
Lay, M ;
Happek, U ;
Stickney, JL .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2002, 524 :273-285
[9]   Growth of Bi2Te3 and Sb2Te3 thin films by MOCVD [J].
Giani, A ;
Boulouz, A ;
Pascal-Delannoy, F ;
Foucaran, A ;
Charles, E ;
Boyer, A .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1999, 64 (01) :19-24
[10]   ELECTROCHEMICAL ATOMIC LAYER EPITAXY (ECALE) [J].
GREGORY, BW ;
STICKNEY, JL .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 300 (1-2) :543-561