Tunable angle-dependent electrochemistry at twisted bilayer graphene with moiré flat bands
- Journal: nature chemistry
- Published Year: 2022
- Authors: Yun Yu, Kaidi Zhang, Holden Parks, Mohammad Babar, Stephen Carr, Isaac M. Craig, Madeline Van Winkle, Artur Lyssenko, Takashi Taniguchi, Kenji Watanabe, Venkatasubramanian Viswanathan & D. Kwabena Bediako
- Application: electrochemistry, 2D Materials , Graphene
Summary
This study reveals a strong twist-angle dependence of electron transfer kinetics at twisted bilayer graphene electrodes, with maximal enhancement near the magic angle (~1.1°). Moiré superlattices modulate band structures, forming flat bands that enhance charge transfer at solid–liquid interfaces. Combined experiments and simulations show that electrochemical activity is driven by moiré lattice relaxation and AA-stacked topological defects, highlighting a mechanism beyond local density of states enhancement.
