Lateral Non-covalent Clamping of Graphene at the Edges Using a Lipid Scaffold

Developing a clean handling and transfer process, capable of preserving the integrity of two-dimensional materials, is still a challenge. Here, we present a flexible, dynamic, and lipid-based scaffold that clamps graphene at the edges providing a practical, simple, and clean graphene manipulation and transfer method. Lipid films with different surface pressures are deposited at the air/copper-etchant interface immediately after placing the graphene samples. We show that at surface pressures above 30 mN/m, the lateral support prevents graphene movement and cracking during all etching and transfer. The method provides new insights into the handling of graphene and can yield efficient, sensitive, and clean graphene-based devices.开发一种可维持二维材料完整性的洁净处理与转移工艺，仍是一项颇具挑战的课题。本研究提出一种柔性动态脂质基支架，通过在边缘夹持石墨烯，实现了一种实用、简便且洁净的石墨烯操控与转移方法。在放置石墨烯样品后，我们即刻将不同表面压的脂质薄膜沉积于空气/铜蚀刻剂界面处。实验结果表明，当表面压高于30 mN/m时，侧向支撑可在整个蚀刻与转移过程中抑制石墨烯的移位与开裂。该方法为石墨烯的操控提供了全新研究思路，有望制备出高效、灵敏且洁净的石墨烯基器件。