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• Main Authors: Bo-yan Huang, 黃伯彥
• Other Authors: S. L. Cheng
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/20041916125993244912

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 101 === In this study, we have demonstrated that length-tunable copper nanowires and nanotubes were successfully produced by using the anodic aluminum oxide (AAO) nanotemplate combined with the electrodeposition process. Field emission measurements showed that the copper nanowires and nanotubes have excellent field emission properties. The turn-on fields of Cu nanowire and nanotube are 0.283 V/μm and 0.367 V/μm, respectively. Moreover, the field enhancement factor(β) of Cu nanowires was found to be larger than that of Cu nanotubes, the result might be attributed to the so-called screen effect. By combining the AAO template and pulse electrodeposition technique, single crystal Cu nanowires with twinned structures were successfully fabricated in this study. The diameter of twinned Cu nanowires was about 50 nm, and their aspect ratio can be reached to as high as 1000. Furthermore, the density of twins formed in the Cu nanowires can be readily tuned and controlled by adjusting the pulse electrodeposition conditions. In this work, oxidation of Cu nanowires and nanotubes was carried out at 250 ℃ for different time in air. The morphology, crystal structure, and formation mechanism of the Cu oxide nanostructures formed have been systematically investigated by SEM, TEM, SAED, and EDS analyses.