Tsinghua University Press;Heidelberg: Tsinghua University Press
摘要:
摘要： We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio ( I D / I G ) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp 2 bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed. 其他題名： Nano Res 出版者： Heidelberg: Tsinghua University Press 出版日期： 2012-12-01 出處： Nano Research, 2012-12, Vol.5 (12), p.854-862 版權： Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012 識別號： ISSN: 1998-0124 識別號： EISSN: 1998-0000 識別號： DOI: 10.1007/s12274-012-0269-3
