The effect of defects on the mechanics of large-area free-standing graphene
W.L. Chung(鍾文梁)1*, Y.T. Chuang(莊曜滕)1, M.C. Chuang(莊敏強)1, W.Y. Woon(溫偉源)1
1Condensed matter physics laboratory, Department of physics, National Central University, Taoyuan, Taiwan
* presenting author:WenLiang Chung,
Graphene, as known as a real 2D structure material, is full of many optical, mechanical and electrical properties. Based on this, free-standing graphene is considered to have more possible applied potential than traditional graphene-based devices in many aspects. For example, without the beneath substrate, there is no interference or scattering from it. Without the support, such a free-standing film is especially sensitive to its own mechanical deformations. In addition, though several methods were already developed in order to fabricate graphene, it is still hard for us to get large-area intrinsic graphene without defects. Significantly, the influence of the defects in 2D structures is more obvious than traditional 3D structures. We want to know if there is any interplay between defects and the mechanical properties of free-standing graphene. To accomplish this, we derive graphene via the CVD method and let it suspended over a substrate with holes of different sizes. We try to generate defects in the suspended graphene by different ways to control their types and concentrations. Finally, we use an optical measurement to confirm the effect made by these defects. We hope that we could find further relationships via our experiments.

Keywords: suspended graphene, free-standing graphene, graphene, defect