Raman study of nanotube–substrate interaction using single‐wall carbon nanotubes grown on crystalline quartz

In this work, we have studied the resonance Raman spectra of 17 single-wall carbon nanotube (SWNT) serpentines, using a 532 nm laser. Each serpentine consists of a series of straight, parallel, and regularly spaced segments, connected by alternating U-turns formed on top of crystalline miscut quartz. The interaction between the SWNT and the substrate affects the properties of nanotubes, generating different behaviors of the G-band. We observed variations in the G-band frequency along the SWNTs, which can be organized into three different groups, as a result of different types of interaction with the substrate, generated during the deposition of the SWNTs.