碳纳米管在高压下的电学性质与状态方程

 在金刚石压砧装置上，采用电阻测量方法研究了多层碳纳米管在室温下、23 GPa内的电阻与压力的关系。实验结果表明，在1.5～4.6 GPa内，电阻急剧减小，而在5.7 GPa左右，电阻出现一个极大值。这些变化与碳纳米管的结构、形状和层间距离的变化有关。同时，还在活塞-圆筒式p-V关系测量装置上首次研究了多层碳纳米管在室温下、4.5 GPa内的p-V关系，给出了它在第一次和第七次压缩时的状态方程。

ELECTRICAL PROPERTY AND EQUATIONS OF STATE IN CARBON NANOTUBES AT HIGH PRESSURE

The resistance-pressure relationship for multi-wall carbon nanotubes at room temperature and up to 23 GPa was studied in a diamond anvil cell using resistance measurement. The experimental results show that the resistance decreases sharply with pressure in 1.5～4.6 GPa, and exhibits a maximum value at about 5.7 GPa, which concerns the changes of the structure, shape and inter layer distance of carbon nanotubes. In the present work, the p-V relationships for multi-wall carbon nanotubes at room temperature at pressures up to 4.5 GPa were first studied using the piston-cylinder type measurement device for the p-V relationship. Its equations of state at first and seventh time compression were given.