Raman spectra of the CNT-FET structure. At the channels (black curve) and at the electrodes (pink curve) using an excitation wavelength of 488 nm. The main bands characteristic of carbon nanostructures are visible: D band at 1,351 cm−1, G− at 1,571 cm−1, and G+ at 1,593 cm−1.
Rodriguez et al. Nanoscale Research Letters 2012 7:682 doi:10.1186/1556-276X-7-682