Tunable Raman spectroscopy of carbon nanotubes under high pressure

这项提议的目的是为了验证这样一种观点，即世界各地不同的研究小组观察到的碳纳米管在高压下令人费解的行为变化是由于拉曼共振效应。这意味着纳米管的高压拉曼光谱——实际上是对不同溶剂中纳米管的研究——绝对需要可调谐的激光激发，所以相同的纳米管（直径和手性）可以随着条件的改变而被挑选出来。这将使高压拉曼光谱的精度大大提高，从而可以获得单壁碳纳米管的可靠和确定的高压数据。据我们所知，世界上没有任何实验室具备该方案所需的能力（可调拉曼和高压），因此该装置将构成一种新颖的、确实独特的设施。该方案的结果将对有关该主题的整个文献产生关键影响。该结果将为碳纳米管在施加应力下的机械响应提供可靠的测试手段，并将为纳米管的机械和电子特性之间的相互作用（和联系）提供决定性的见解。这将为学术界和开发碳纳米管的纳米技术工作者提供重要的信息。

The purpose of this proposal is to test the idea that the puzzling variations in the behaviour of carbon nanotubes under high pressure observed by different research groups around the world are due to Raman resonance effects. The implication is that high-pressure Raman spectroscopy of nanotubes - and indeed the study of nanotubes in different solvents - absolutely requires tunable laser excitation, so the same nanotubes (diameter and chirality) can be picked out as the conditions are changed. This would bring high-pressure Raman to a much higher degree of precision and here enable reliable and definitive high-pressure data to be obtained for single wall carbon nanotubes. As far as we are aware, no laboratory world-wide has the capabilities (tunable Raman plus high pressure) required for this programme, so the apparatus will constitute a novel, indeed unique facility. The results of this programme will have pivotal implications for the entire literature on the subject. The results will provide means of reliable testing of mechanical response of carbon nanotubes to applied stress and will provide decisive insights into interplay (and connection) between mechanical and electronic properties of nanotubes. This will provide vital information to the academic community and to workers in nanotechnology exploiting carbon nanothubes.