Frank S, Poncharal P, Wang ZL, Heer WA
S. Frank, P. Poncharal, W. A. de Heer, School of Physics, Georgia Institute of Technology, Atlanta GA 30332, USA. Z. L. Wang, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA.
Science. 1998 Jun 12;280(5370):1744-6. doi: 10.1126/science.280.5370.1744.
The conductance of multiwalled carbon nanotubes (MWNTs) was found to be quantized. The experimental method involved measuring the conductance of nanotubes by replacing the tip of a scanning probe microscope with a nanotube fiber, which could be lowered into a liquid metal to establish a gentle electrical contact with a nanotube at the tip of the fiber. The conductance of arc-produced MWNTs is one unit of the conductance quantum G0 = 2e2/h = (12.9 kilohms)-1. The nanotubes conduct current ballistically and do not dissipate heat. The nanotubes, which are typically 15 nanometers wide and 4 micrometers long, are several orders of magnitude greater in size and stability than other typical room-temperature quantum conductors. Extremely high stable current densities, J > 10(7) amperes per square centimeter, have been attained.
发现多壁碳纳米管（MWNTs）的电导是量子化的。实验方法包括用纳米管纤维替换扫描探针显微镜的尖端来测量纳米管的电导，该纳米管纤维可以放入液态金属中，以便在纤维尖端与纳米管建立良好的电接触。电弧法制备的多壁碳纳米管的电导是电导量子G0 = 2e2/h = (12.9千欧)-1的一个单位。纳米管以弹道方式传导电流且不散热。这些纳米管通常宽15纳米、长4微米，其尺寸和稳定性比其他典型的室温量子导体大几个数量级。已经实现了极高的稳定电流密度，J > 10(7) 安培每平方厘米。
