Figure 4.

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.