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arXiv 0909.0768cond-mat.mes-hall
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碳纳米管表面的相变

Phase transitions on the surface of a carbon nanotube

Zenghui Wang, Jiang Wei, Peter Morse, J. Gregory Dash, Oscar E. Vilches, David H. Cobden

摘要:

悬浮的碳纳米管可以作为纳米级谐振器,具有显着的机电性能和在单原子水平上检测其表面吸附的能力。了解纳米管和其他石墨材料上的吸附是许多传感和存储应用的关键。在这里,我们表明,纳米管谐振器提供了一个强大的新手段,调查碳上的吸附的基本方面,包括吸附物质的集体行为及其耦合到衬底电子。通过监测在惰性气体的存在下的振动共振频率,我们观察到的圆柱形表面上的单分子膜的形成和这些单分子膜内的相变,并同时修改的电导。单层观测也表明了研究圆柱几何中物质基本行为的可能性。

英文摘要:

A suspended carbon nanotube can act as a nanoscale resonator with remarkable electromechanical properties and the ability to detect adsorption on its surface at the level of single atoms. Understanding adsorption on nanotubes and other graphitic materials is key to many sensing and storage applications. Here we show that nanotube resonators offer a powerful new means of investigating fundamental aspects of adsorption on carbon, including the collective behaviour of adsorbed matter and its coupling to the substrate electrons. By monitoring the vibrational resonance frequency in the presence of noble gases, we observe the formation of monolayers on the cylindrical surface and phase transitions within these monolayers, and simultaneous modification of the electrical conductance. The monolayer observations also demonstrate the possibility of studying the fundamental behaviour of matter in cylindrical geometry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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