Improved Electric Transport Properties of a Multi-wall carbon Nanotube

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2003,（8）
• 页码范围: 1333-1335
• 页数: 3页
• 语种: 英文

摘要

Up to now quantized conductance of the carbon nanotube has only been observed by replacing the tip of a scanning probe microscope with the tube and putting the other end of the tube in a liquid metal [Science 280(1998) 1744]. Probably cleaning the tube by the liquid metal has improved its quality and gives rise to the quantized conductance. We report on a new method to improve the electric transport properties of a single multi-wall carbon nanotube by Joule heating. Our experiment indicates that the conductance of the tube can be greatly improved just by repeated scanning the bias voltage in vacuum.