In situ resistance measurements of strained carbon nanotubes
In situ resistance measurements of strained carbon nanotubes
复制标题
应变碳纳米管的原位电阻测量
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Sean Washburn
中科院分区：
文献类型：
--
作者：
Scott Paulson;M. Falvo;Neal Snider;A. Helser;Thomas C. Hudson;Adam Seeger;Russell M. Taylor;R. Superfine;Sean Washburn
我们研究了多壁碳纳米管的响应与原子力显微镜探针施加机械应变。我们发现在一些样品中，接触电阻的变化主导了测量的电阻变化。在其他情况下，可以施加足够大的应变以使管断裂，而不会显著改变接触电阻。在这种情况下，我们观察到施加足够的力以使管破裂，而电阻没有任何变化，直到管失效。我们还操纵了断裂管的两端，使其相互接触，重新建立了有限的阻力。我们观察到，在这种断裂配置中，样品的电阻可调谐到比断裂前大15-350 kΩ的值。
We investigate the response of multiwalled carbon nanotubes to mechanical strain applied with an atomic force microscope probe. We find in some samples, changes in the contact resistance dominate the measured resistance change. In others, strain large enough to fracture the tube can be applied without a significant change in the contact resistance. In this case, we observe that enough force is applied to break the tube without any change in resistance until the tube fails. We have also manipulated the ends of the broken tube back in contact with each other, re-establishing a finite resistance. We observe that, in this broken configuration, the resistance of the sample is tunable to values 15–350 kΩ greater than prior to breaking.