Open AccessOscillation control of carbon nanotube mechanical resonator by electrostatic interaction induced retardation
Author(s) -
Masaaki Yasuda,
Kuniharu Takei,
Takayuki Arie,
Seiji Akita
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep22600
Subject(s) - carbon nanotube , oscillation (cell signaling) , resonator , nanotube , nanotechnology , materials science , acoustics , physics , chemical physics , chemistry , optoelectronics , biochemistry
Despite the superb intrinsic properties of carbon nanotube mechanical resonators, the quality factors at room temperature are 1,000 or less, even in vacuum, which is much lower than that of mechanical resonators fabricated using a top-down approach. This study demonstrates the improvement of the quality factor and the control of nonlinearity of the mechanical resonance of the cantilevered nanotube by electrostatic interaction. The apparent quality factor of the nanotube supported by insulator is improved drastically from approximately 630 to 3200 at room temperature. Results show that retardation of the electrostatic force induced by the contact resistance between the nanotube and the insulator support improves the quality factor. Finite element method calculation reveals that the nonuniform pileup charge on the insulator support strongly influences the nonlinearity of the resonance.