Mechanical resonance properties of porous graphene membrane; simulation study and proof of concept experiment
- 주제(키워드) Finite element method , Mechanical resonator , Nanomechanical system , Porous graphene
- 등재 SCIE, SCOPUS, KCI등재
- 발행기관 Elsevier B.V.
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000175555
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.cap.2020.12.011
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Mechanical resonance properties of porous graphene resonators were investigated by simulation studies. The finite element method was utilized to design the porous graphene membrane pattern and to calculate the mechanical resonance frequency and quality factor. The changes in the resonance frequency and quality factor were systematically studied by changing the size, number, and relative location of pores on the graphene membrane. Mass loss and carbon-carbon bond break were found to be the main competing parameters for determining its mechanical resonance properties. The correlation between the geometry and the damping effect on the mechanical resonance of graphene was considered by suggesting a model on the damping factor and by calculating the membrane deflections according to the pore location. Based on the simulation results, an optimal porosity and porous geometry were found that gives the maximum resonance frequency and quality factor. Suspended graphene with various number pore structures was experimentally realized, and their mechanical resonance behaviors were measured. The trend of changes in resonance frequency and quality factor according to the number of pores in the experiment was qualitatively agreed with simulation results. © 2021 Korean Physical Society
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