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

ERDOGAN I. Y., Demir U.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.633, sa.1, ss.253-258, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 633 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.jelechem.2009.06.010
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.253-258
  • Anahtar Kelimeler: 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
  • Atatürk Üniversitesi Adresli: Evet

Özet

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.