掺杂对单层石墨烯纳米梁振动频率的影响  

Effect of doping on vibration frequency of monolayer graphene nanoribbons

作　　者：王志钦 王静[1] WANG Zhi-Qin;WANG Jing(College of Physics Science and Technology,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学物理科学与技术学院,乌鲁木齐830017

出　　处：《原子与分子物理学报》2025年第3期67-71,共5页Journal of Atomic and Molecular Physics

基　　金：新疆维吾尔自治区自然科学基金(2022D01C423);东南大学MEMS教育部重点实验室开放研究基金。

摘　　要：石墨烯优异的力学和电学等性能,使其成为纳米机电谐振器的理想材料.通过分子动力学模拟方法研究了掺杂元素和掺杂浓度对单层石墨烯纳米梁振动特性的影响.研究结果表明,单层石墨烯纳米梁的振动频率随纳米梁长度的增加而减小,硼(B)掺杂、硼-硼(B-B)掺杂、铍(Be)掺杂和铍-铍(Be-Be)掺杂均会导致单层石墨烯纳米梁的振动频率降低.此外,随着硼(B)/铍(Be)掺杂浓度的增加,单层石墨烯纳米梁的振动频率逐渐降低.且随着掺杂浓度的增加,硼(B)掺杂石墨烯纳米梁的振动频率和铍(Be)掺杂石墨烯纳米梁的振动频率的差异逐渐增大.这对石墨烯纳米机械谐振器、振荡器等纳米器件的设计具有一定的理论指导意义.The excellent mechanical and electrical properties of graphene make it an ideal material for nanoelectromechanical resonators.The effects of doping elements and doping concentrations on the vibration characteristics of monolayer graphene nanoribbons were studied by molecular dynamics simulation.The results show that the vibration frequency of single-layer graphene nanoribbon decreases with the increase of nanoribbon length.Boron(B)doping,Boron-Boron(B-B)doping,Beryllium(Be)doping and Beryllium-Beryllium(Be-Be)doping all lead tothedecrease in vibration frequency of single-layer graphene nanoribbons.In addition,with the increase of the Boron(B)/Beryllium(Be)doping concentration,the vibration frequency of the single-layer graphene nanoribbon gradually decreases.With the increase of doping concentration,the difference of vibration frequency between Boron(B)doped graphene nanoribbons and Beryllium(Be)doped graphene nanoribbons gradually increases.It has a certain theoretical significance for the design of graphene nanomechanical resonators,oscillators and other nanodevices.

关 键 词：石墨烯 振动频率 分子动力学 

分 类 号：O469[理学—凝聚态物理]