Role of the pressure transmitting medium on the pressure effects in DWCNTs
Role of the pressure transmitting medium on the pressure effects in DWCNTs
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DOI：
10.1002/pssb.201300062
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
B. Anis;F. Börrnert;M. Rümmeli;C. Kuntscher
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文献类型：
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作者：
B. Anis;F. Börrnert;M. Rümmeli;C. Kuntscher
我们使用氮气、氩气和酒精混合物作为压力传输介质 (PTM)，对直径为 0.80 nm 和直径为 1.45 nm 的双壁碳纳米管进行高压光谱研究。外管中压力引起的光学跃迁红移非常小，低于 10 GPa，这表明内管增强了机械稳定性。临界压力 Pd ≈ 12 GPa 处的异常表明压力引起的管横截面变形的开始。使用氩气作为 PTM 会对结果产生定量影响：Pd 值较低且吸收带显着展宽。此外，由于其凝固，作为 PTM 的酒精混合物似乎会在 10 GPa 以上完全破坏管子。将结果与单壁碳纳米管的结果进行比较。
We present a high‐pressure optical spectroscopy study on double‐walled carbon nanotubes with dinner≈ 0.80 nm and douter≈ 1.45 nm using nitrogen, argon, and alcohol‐mixture as pressure transmitting medium (PTM). The pressure‐induced redshift of the optical transitions in the outer tubes is very small below 10 GPa, demonstrating the enhanced mechanical stability due to the inner tube. An anomaly at the critical pressure Pd ≈ 12 GPa signals the onset of the pressure‐induced deformation of the tubular cross‐sections. Using argon as PTM affects the results quantitatively: The Pd value is lower and the absorption bands are broadened considerably. Furthermore, alcohol‐mixture as PTM seems to destroy the tubes completely above 10 GPa due to its solidification. The results are compared with those for single‐walled carbon nanotubes.