@article{bc91c202f9de45a29b6a0185a504894d,
title = "High-yield exfoliation of 2D semiconductor monolayers and reassembly of organic/inorganic artificial superlattices",
abstract = "The scalable preparation of high-purity monolayers is essential for practically integrating two-dimensional (2D) semiconductors in diverse technologies but remains a persistent challenge. Previous efforts to exfoliate 2D layered crystals by the organic ammonium intercalation usually produce few-layer nanosheets owing to a self-retarding effect that hinders the complete intercalation in neighboring layers. Herein, we report a unique “intercalation and separation” chemistry with a constant self-refreshing crystal surface that mitigates the self-retarding effect to ensure a complete intercalation of the bulk crystal, ultimately enabling high-yield solution-phase exfoliation of 2D semiconductor monolayers in excellent purity (e.g., monolayer purity of >95\% for In2Se3 and InSe). Furthermore, we have assembled large-area organic/inorganic hybrid superlattices with diverse organic molecules and inorganic 2D monolayer crystals, thus creating a family of artificial superlattice materials with atomically modulated chemical compositions, widely tunable superlattice periodicities, and specifically tailorable electronic and thermal properties.",
keywords = "2D semiconductor monolayers, exfoliation, intercalation, organic/inorganic artificial superlattices, SDG9: Industry, innovation, and infrastructure, solution-processable, tunneling",
author = "Zhaoyang Lin and Zhong Wan and Frank Song and Bolong Huang and Chuancheng Jia and Qi Qian and Kang, \{Joon Sang\} and Yutong Wu and Xingxu Yan and Lele Peng and Chengzhang Wan and Jingyuan Zhou and Zdenek Sofer and Imran Shakir and Zeyad Almutairi and Sarah Tolbert and Xiaoqing Pan and Yongjie Hu and Yu Huang and Xiangfeng Duan",
note = "Funding Information: X.D. acknowledges the support from the United States Department of Energy , Office of Basic Energy Sciences , Division of Materials Science and Engineering through award DE-SC0018828. Y.H. acknowledges the support from the Office of Naval Research through award N00014-18-1-2491. Z.S. was supported by the Czech Science Foundation through GACR no. 20-16124J. I.S. and Z.A. acknowledge the support by the International Scientific Partnership Program ( ISPP-147 ) at King Saud University. The use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, was supported by the United States Department of Energy , Office of Science , Office of Basic Energy Sciences under contract no. DE-AC02-76SF00515. The authors acknowledge the use of facilities and instrumentation at the UC Irvine Materials Research Institute (IMRI), which is supported in part by the National Science Foundation through the UC Irvine Materials Research Science and Engineering Center (DMR-2011967). We acknowledge Peiqi Wang at the University of California , Los Angeles, for the discussion on the tunneling process of the superlattices and Dr. Yi Xia at Northwestern University for assistance with the mechanical properties of 2D layered crystals. Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",
year = "2021",
month = jul,
day = "8",
doi = "10.1016/j.chempr.2021.03.022",
language = "English",
volume = "7",
pages = "1887--1902",
journal = "Chem",
issn = "2451-9308",
publisher = "Elsevier Inc.",
number = "7",
}