Maki Hideyuki, Sato Testuya, Ishibashi Koji
Department of Applied Physics and Physico-Informatics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223-8522, Japan.
Nano Lett. 2007 Apr;7(4):890-5. doi: 10.1021/nl062680v. Epub 2007 Mar 15.
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.
我们制造了一种用于对单个悬浮的单壁碳纳米管（SWNT）施加单轴应变的新装置，并研究了单个悬浮SWNT在拉伸状态下的形态和光致发光（PL）。通过扫描电子显微镜（SEM）直接观察SWNT在拉伸过程中的变形和断裂过程。从PL测量中，在弹性应变下测量由于带隙变化引起的发射能量偏移。发射偏移的行为可以与SEM观察到的变形过程相关联。此外，在断裂前还观察到由于SWNT的弹性应变导致的发射强度降低。
