Dual-mode mechanical resonance of individual ZnO nanobelts
Xuedong BaiSchool of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245Pengfei GaoSchool of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245Zhong Lin WangSchool of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245E. G. WangInternational Center for Quantum Structures and State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
2003en
ABI
Аннотация
The mechanical resonance of a single ZnO nanobelt, induced by an alternative electric field, was studied by in situ transmission electron microscopy. Due to the rectangular cross section of the nanobelt, two fundamental resonance modes have been observed corresponding to two orthogonal transverse vibration directions, showing the versatile applications of nanobelts as nanocantilevers and nanoresonators. The bending modulus of the ZnO nanobelts was measured to be ∼52 GPa and the damping time constant of the resonance in a vacuum of 5×10−8 Torr was ∼1.2 ms and quality factor Q=500.
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