Direct observation of the deformation and the band gap change from an individual single-walled carbon nanotube under uniaxial strain.
Direct observation of the deformation and the band gap change from an individual single-walled carbon nanotube under uniaxial strain.
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DOI：
10.1021/nl062680v
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发表时间：
2007-03
期刊：
影响因子：
10.8
通讯作者：
H. Maki;Testuya Sato;K. Ishibashi
中科院分区：
文献类型：
--
作者：
H. Maki;Testuya Sato;K. Ishibashi
我们制作了一个新的装置，用于施加单轴应变到单个悬浮的单壁碳纳米管，并在拉伸下的单个悬浮的单壁碳纳米管的形式和光致发光（PL）进行了研究。用扫描电镜（SEM）直接观察了单壁碳纳米管在拉伸条件下的变形和断裂过程。根据PL测量，在弹性应变下测量由于带隙变化引起的发射能量偏移。发射位移的行为可以与SEM观察到的变形过程有关。此外，由于单壁碳纳米管的弹性应变的发射强度降低也观察到即将破裂。
We have fabricated a new device for applying uniaxial strain to an individual suspended SWNT, and the form and the photoluminescence (PL) of an individual suspended SWNT under stretching are investigated. The processes of deformation and break of a SWNT under stretching are directly observed by scanning electron microscopy (SEM). From the PL measurements, the emission energy shifts due to the band gap change are measured under the elastic strain. The behaviors of the emission shifts can be related to the deformation processes observed by SEM. Moreover, the emission intensity reduction due to the elastic strain of a SWNT is also observed just before breaking.