School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
Nanotechnology. 2017 Apr 7;28(14):145706. doi: 10.1088/1361-6528/aa6053.
We explored the transfer of a single-layered graphene membrane assisted by substrate adhesion. A relatively larger adhesion force was measured on the SiO substrate compared with its van der Waals contribution, which is expected to result from the additional contribution of the chemical bonding force. Density functional theory calculations verified that the strong adhesion force was indeed accompanied by chemical bonding. The transfer of single-layered graphene and subsequent deposition of the dielectric layer were best performed on the SiO substrate exhibiting a larger adhesion force. This study suggests the selection and/or modification of the underlying substrate for proper transfer of graphene as well as other 2D materials similar to graphene.
我们探索了在基底粘附辅助下单层石墨烯膜的转移。与范德华力相比，我们在 SiO 基底上测量到相对较大的粘附力，这预计是由于额外的化学键力的贡献所致。密度泛函理论计算证实了强粘附力确实伴随着化学键。在表现出较大粘附力的 SiO 基底上，单层石墨烯的转移和随后的介电层沉积效果最佳。这项研究表明，对于石墨烯和其他类似石墨烯的二维材料的适当转移，需要对基底进行选择和/或修饰。
