INOR 45 |
| Non-stoichiometric Ag2Se has been shown to possess a positive, high-field, linear magnetoresistance, although the mechanism remains unclear. To aid in elucidation of the mechanism, we have studied this system on the nanoscale by electrodeposition of nanowire arrays into nanoporous alumina membranes. Due to the difficulties involved with the controlled electrodeposition of Ag in aqueous solution, an aprotic, complexing solvent (dimethyl sulfoxide, DMSO) with different supporting electrolytes (NaNO3 and tetrabutylammonium chloride) were chosen as alternative media for the electrodeposition of Ag2Se nanowire arrays. Deposition conditions and general electrochemical behavior of Ag and Se in DMSO were investigated by multicycle cyclic voltammetry and thin film growth. Scanning electron microscopy and powder X-ray diffraction were used to compare the morphological and structural quality of Ag2Se nanowire arrays synthesized from the two electrolyte solutions under study. |
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Nanoscience: Synthesis
9:00 AM-12:00 PM, Sunday, 10 September 2006 Moscone Center -- Room 309, Oral
Division of Inorganic Chemistry |