Graphene foam resonators:Fabrication and characterization  

作　　者：Yahav Ben-Shimon Siva KReddy Assaf Ya'akobovitz 

机构地区：[1]Department of Mechanical Engineering,Faculty of Engineering Sciences,Ben-Gurion University of the Negev,Israel

出　　处：《Nano Research》2022年第1期225-229,共5页纳米研究（英文版）

摘　　要：Three-dimensional graphene foams(GFs)benefit from a large surface area and unique physical properties.We present here the first-ever miniaturized GF-based resonators.We developed a simple yet reliable fabrication process,in which GFs are synthesized and assembled on a cavity to form suspended GF devices.We electrostatically excited these devices and analyzed their resonance and ring-down responses.We observed significant energy dissipation,as the quality factor of the devices was in the order of several tens.Additionally,we investigated the influence of temperature on the operation of the devices and found that high temperatures mechanically soften the resonators but also considerably enhance energy dissipation.Finally,our devices demonstrated a mode-coupling of a resonance mode and a mode having twice its frequency.Thus,this work paves the way toward the development of novel GF resonators that could be integrated into future devices,such as GF-based nano-electromechanical sensors,electrical circuits,and oscillators.

关 键 词：energy dissipation graphene foam micro/nano electromechanical systems three-dimensional graphene resonators 

分 类 号：TB383[一般工业技术—材料科学与工程]