Carbon nanotube oscillators toward zeptogram detection

Nishio, Mitsumasa; Sawaya, Shintaro; Akita, Seiji; Nakayama, Yoshikazu
March 2005
Applied Physics Letters;3/28/2005, Vol. 86 Issue 13, p133111
Academic Journal
We demonstrate an application of a nanotube cantilever for zeptogram-level mass detection. This letter presents a quantitative method to measure the oscillation amplitude of a nanotube cantilever using a focused electron beam of a scanning electron microscope. The quality factor of ∼1000 for the nanotube cantilever is revealed and the resolution of the resonant frequency is achieved to be ∼10 Hz, which corresponds to a mass range of less than 100 zg at room temperature.


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