黄晓明

个人信息Personal Information

副教授

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:化工海洋与生命学院

学科:凝聚态物理. 工程力学

办公地点:D07-304-2

电子邮箱:huangxm@dlut.edu.cn

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Tunable bending modulus and bending limit of oxidized graphene

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论文类型:期刊论文

发表时间:2020-01-21

发表刊物:NANOSCALE

收录刊物:PubMed、EI、SCIE

卷号:12

期号:3

页面范围:1623-1628

ISSN号:2040-3364

摘要:Graphene is highly flexible and widely used in flexible devices. However, is the oxidized graphene more flexible than graphene? This is still under debate between simulations and experiments. By employing density functional theory calculations, we show that the bending modulus of oxidized graphene is quite tunable by changing the type and coverage of the functional groups, as well as the bending direction. The hydroxyl increases the bending modulus of graphene, but epoxide can degrade the bending modulus in the armchair bending direction, making the oxidized graphene more flexible than graphene. On the other hand, there exists a curvature limit during bending the oxidized graphene, where OMIDLINE HORIZONTAL ELLIPSISH hydrogen bonds start to transform into O-H covalent bonds. Generally, our results demonstrate the effects of the functional groups and bending direction on the flexibility of oxidized graphene, which should be helpful to design graphene-based flexible devices.