A Carbon Nanotube Field-Effect Transistor with a Cantilevered Carbon Nanotube Gate

We propose a self-detecting carbon nanotube resonator device consisting of a nanotube field-effect transistor with a vibrating cantilevered nanotube gate. With this device, we detected the resonance of the cantilevered nanotube by measuring the drain current through the nanotube channel. We also estimated the induced electric charge on a nanotube cantilever using the finite element method. The amplitude of the resonance and effective spring constant of the nanotube cantilever used were estimated to be 60 nm and 5.1 × 10 -4 N/m, respectively, corresponding to the spring constant derived with the Young's modulus of 270 GPa.