Strain effect of cellulose-wrapped single-walled carbon nanotubes measured by photoluminescence and Raman scattering spectroscopy

摘要

The photoluminescence (PL) of single-walled carbon nanotubes (SWNTs) can be obtained even under the dry condition when SWNTs are dispersed in biochemical polymers. We fabricated transparent films composed of SWNTs and a large amount of carboxymethyl cellulose (CMC), and evaluated the effects of CMC wrapping on PL properties. The PL peaks from the transparent CMC-SWNT film showed SWNT-type-dependent peak shifts, indicating that SWNTs were under uniaxial compression strain in the CMC film. Raman scattering spectra also suggested uniaxial compression strain. The rate of strain was estimated to be 0.3-0.4% by PL and Raman scattering spectroscopies. Furthermore, the release of strain was demonstrated by stretching the CMC film. (C) 2016 The Japan Society of Applied Physics