One-step electrochemical synthesis and physico-chemical characterization of CdSe nanotubes
- Authors: Bocchetta, P; Santamaria, M; Di Quarto, F
- Publication year: 2013
- Type: Articolo in rivista (Articolo in rivista)
- Key words: Anodic alumina membranes; Cadmium selenide; Chalcogenide; Electrodeposition; Nanotubes; Template;
- OA Link: http://hdl.handle.net/10447/91383
Abstract
Stoichiometric CdSe nanotubes (NTs) with a length of ∼700 nm have been successfully grown by one-step electrochemical technique into anodic alumina membranes. Cyclovoltammetric method has been performed using porous anodic alumina as template electrode and an electrochemical bath containing Cd 2+ ions and SeO2. The as-prepared NTs have been identified as face-centred-cubic CdSe by XRD, while micro-Raman analysis reveals the typical peaks of nanostructured CdSe. The stoichiometric deposition of CdSe NTs formation is suggested by EDX analysis, with an average atomic percentage of Cd:Se of ∼0.93. Photoelectrochemical measurements reveal that CdSe NTs are photoactive materials with direct band gap of 1.75 eV and n-type semiconducting behaviour. © 2012 Elsevier Ltd. All rights reserved.