Super-Elastic Graphene Ripples for Flexible Strain Sensors
Super-Elastic Graphene Ripples for Flexible Strain Sensors
复制标题
用于柔性应变传感器的超弹性石墨烯波纹
DOI：
10.1021/nn103523t
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发表时间：
2011-05-01
期刊：
影响因子：
17.1
通讯作者：
Zhang, Guangyu
中科院分区：
文献类型：
--
作者：
Wang, Yi;Yang, Rong;Zhang, Guangyu
在这项研究中，我们报告了一个屈曲的方法，石墨烯和石墨烯带可拉伸弹性体基板。采用不同预应变的拉伸聚二甲基硅氧烷（PDMS）薄膜来接收石墨烯，应变释放后石墨烯自发形成纳米尺度的周期性屈曲。石墨烯波纹的形貌和周期性与其初始形状和衬底的预应变密切相关。窄的石墨烯带更容易形成规则的周期性波纹，并且随着PDMS预应变的增加，波纹的幅度和周期性都减小。石墨烯波纹具有提供大应变变形的能力，因此使其成为柔性电子应用的理想选择。研究了石墨烯带和纳米石墨烯薄膜波纹作为应变传感器的可行性，并研究了它们在不同应变下的电阻变化。由于石墨烯具有新颖的机械和电学特性，这种简单可控的弯曲石墨烯工艺为石墨烯柔性电子器件和应变传感器的制造提供了可行的方法。
In this study, we report a buckling approach for graphene and graphene ribbons on stretchable elastomeric substrates. Stretched polydimethylsiloxane (PDMS) films with different prestrains were used to receive the transferred graphene, and nanoscale periodical buckling of graphene was spontaneously formed after strain release. The morphology and periodicity of the as-formed graphene ripples are dependent strongly on their original shapes and substrates' prestrains. Regular periodicity of the ripples preferred to form for narrow graphene ribbons, and both the amplitude and periodicity are reduced with the increase of prestrain on PDMS. The graphene ripples have the ability to afford large strain deformation, thus making it ideal for flexible electronic applications. It was demonstrated that both graphene ribbon and nanographene film ripples could be used for strain sensors, and their resistance changes upon different strains were studied. This simple and controllable process of buckled graphene provides a feasible fabrication for graphene flexible electronic devices and strain sensors due to its novel mechanical and electrical properties.