Alumina Nanopores Template-Assisted Growth of Lead Sulfide Thermoelectric Nanowires
| Autor: | Lin Yu-Chang, 林育璋 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 Thermoelectric theory has predicted that the efficiency of thermoelectric devices can be increased by thermoelectric figure of merit of 6. The results of theoretical calculation show that nanowire structures have the potential to significantly improve the thermoelectric figure of merit if nanowire diameter can be decreased to 10 nm. Recent work in thermoelectric nanowire has attracted a great deal of research interest because of their potential application in thermoelectric devices. In this work, we use aluminum foil and aluminum film as substrate to fabricate periodic nanopore arrangement in porous alumina template using an anodic oxidation method. The pore array of the film has a uniform, closely packed honeycomb structure approximately from 40 to 60 nm in diameter and from 2 to 39 μm thickness. PbS nanowire arrays were grown in highly ordered nanochannel of an alumina template using electrodeposition from a dimethylsulfoxide solution cotaining PbCl2 and elemental sulfur. Electromicroscopy results showed that PbS nanowires with diameters of about 50 nm and lengths up to 1 μm were synthesized. X-ray energy dispersion analysis indicates that the atomic composition of Pb and S is very close to a 1:1 stoichiometry. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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