Figure 5: Optically measured mechanical resonances of marked carbon nanotubes.
From: Automated circuit fabrication and direct characterization of carbon nanotube vibrations
(a) Amplitude of vibration of carbon nanotube (CNT) versus excitation frequency of a driven piezoelectric actuator, Vac. The different coloured curves are for different applied voltages of the piezo as plotted in c (2, 4, 8, 12, 18, 20 and 22 V from bottom to top). The different black dashed lines are best fit to Lorentzian curves. (b) Quality factors as extracted from the Lorentzian fit. (c) Maximum amplitude versus the applied ac piezo voltages (subtracted offset bias originated from the electrical setup, V0). (d) Frequencies of the maximal response for different excitation voltages. The chronological time of the measurements were from right to left. (e) The same data as in a for three different Vac’s (dotted coloured lines) and resulted fit (colored lines) according to our finite element model (FEM) discussed in Supplementary Note 7. Vib., Vibration.
