Figure 3
AFM and Raman spectroscopy data analysis. (a) AFM topography image of a SWNT. (b) Raman mapping image measured for a SWNT located between electrodes. (c, d) AFM topography profile for SWNT1 and SWNT2, respectively. (e) Raman spectra of the samples and the quartz substrate showing the G-band and the expected position of the D-band (dotted vertical line). The star marks show peaks attributed to the quartz substrate. (f) A Kataura plot of SWNTs optical energy transitions versus diameter showing the resonance region for the scattered photons (from the laser) with the G-band, with a resonance window of 50 meV. Two SWNTs fall within this region, namely (8,4) and (6,4), which correspond to SWNT1 and SWNT2, respectively.