Title :
Characterization of nanoporous alumina membranes filled by gold particles
Author :
Pruneanu, Stela ; Olenic, Liliana ; Borodi, G. ; Sigartau, G. ; Mihailescu, G.
Author_Institution :
Nat. Inst. of R&D for Isotopic & Molecular Technol., Cluj-Napoca, Romania
Abstract :
In this paper, we describe a method for chemical deposition of gold particles into nanoporous alumina membranes. After deposition, the membranes were investigated by several methods. X-ray diffraction studies have evidenced the presence of gold crystallites in the nanoporous membranes. The size of these crystallites depends on the deposition time. UV-vis absorption spectra of gold-filled membranes reveal a shift of the absorption peak from 520 nm to 580 nm, after deposition in solution with various pH values. Cyclic voltammetric experiments, performed on macro and nanoelectrodes, evidenced a lower detection limit of the redox species, for the nanoelectrode.
Keywords :
X-ray diffraction; alumina; crystallites; electrodes; gold; liquid phase deposition; membranes; nanoparticles; nanoporous materials; ultraviolet spectra; voltammetry (chemical analysis); 520 nm; 580 nm; Au particle filled nanoporous Al2O3 membranes; Au-Al2O3; UV-vis absorption spectra; X-ray diffraction; absorption peak shift; cyclic voltammetry; deposition solution pH; gold crystallites size; gold particle chemical deposition time; gold particle filled nanoporous alumina membranes; macroelectrodes; nanoelectrodes; nanoporous membranes; redox species detection limit; Aluminum; Biomembranes; Chemical technology; Chemistry; Crystallization; Electromagnetic wave absorption; Gold; Nanoporous materials; Oxidation; X-ray diffraction;
Conference_Titel :
Semiconductor Conference, 2002. CAS 2002 Proceedings. International
Print_ISBN :
0-7803-7440-1
DOI :
10.1109/SMICND.2002.1105816
