Thermal investigation under 632.8-nm excitation. (a) Temperature dependence of the LO phonon mode of the GaAs on the tube and on the substrate, respectively. Error bars represent the spectral resolution of ±1 cm−1. Panel (b) shows the reversibility in the Raman spectra on the tube after heating to 300°C and cooling down again.
Rodriguez et al. Nanoscale Research Letters 2012 7:594 doi:10.1186/1556-276X-7-594