Monolayer atomic crystal molecular superlattices

Monolayer atomic crystal molecular superlattices Nature 555, 7695 (2018). doi:10.1038/nature25774 Authors: Chen Wang, Qiyuan He, Udayabagya Halim, Yuanyue Liu, Enbo Zhu, Zhaoyang Lin, Hai Xiao, Xidong Duan, Ziying Feng, Rui Cheng, Nathan O. Weiss, Guojun Ye, Yun-Chiao Huang, Hao Wu, Hung-Chieh Cheng, Imran Shakir, Lei Liao, Xianhui Chen, William A. Goddard III, Yu Huang & Xiangfeng Duan Artificial superlattices, based on van der Waals heterostructures of two-dimensional atomic crystals such as graphene or molybdenum disulfide, offer technological opportunities beyond the reach of existing materials. Typical strategies for creating such artificial superlattices rely on arduous layer-by-layer exfoliation and restacking, with limited yield and reproducibility. The bottom-up approach of using chemical-vapour deposition produces high-quality heterostructures but becomes increasingly difficult for high-order superlattices. The intercalation of selected two-dimensional atomic crystals with alkali metal ions offers an alternative way to superlattice structures, but these usually have poor stability and seriously altered electronic properties. Here we report an electrochemical molecular intercalation approach to a new class of stable superlattices in which monolayer atomic crystals alternate with molecular layers. Using black phosphorus as a model system, we show that intercalation with cetyl-trimethylammonium bromide produces monolayer phosphorene molec...
Source: Nature - Category: Research Authors: Tags: Letter Source Type: research