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Autor: Xia, Tingyi

1 záznamů v PubMed Filtry

Článek

Electrochemical molecular intercalation and exfoliation of solution-processable two-dimensional crystals

Wang, Shengqi
Autor Wang, Shengqi Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China
Xue, Junying
Autor Xue, Junying Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China
Xu, Dong
Autor Xu, Dong Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, CA, USA
He, Jing
Autor He, Jing Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China
Dai, Yongping
Autor Dai, Yongping Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China
Xia, Tingyi
Autor Xia, Tingyi Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China
Huang, Yu
Autor Huang, Yu Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, CA, USA
He, Qiyuan
Autor He, Qiyuan ORCID Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China. qiyuanhe@cityu.edu.hk
Duan, Xiangfeng
Autor Duan, Xiangfeng Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, USA. xduan@chem.ucla.edu California NanoSystems Institute, University of California Los Angeles, Los Angeles, CA, USA. xduan@chem.ucla.edu
Lin, Zhaoyang
Autor Lin, Zhaoyang ORCID Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing, China. zlin@mail.tsinghua.edu.cn

Nature protocols. 2023 Sep ; 18 (9) : 2814-2837. [epub] 20230731

Nat Protoc
ISSN 1750-2799
Zdroj

Electrochemical molecular intercalation of layered semiconducting crystals with organic cations followed by ultrasonic exfoliation has proven to be an effective approach to producing a rich family of organic/inorganic hybrid superlattices and high-quality, solution-processable 2D semiconductors. A traditional method for exfoliating 2D crystals relies on the intercalation of inorganic alkali metal cations. The organic cations (e.g., alkyl chain-substituted quaternary ammonium cations) are much larger than their inorganic counterparts, and the bulky molecular structure endows distinct intercalation and exfoliation chemistry, as well as molecular tunability. By using this protocol, many layered 2D crystals (including graphene, black phosphorus and versatile metal chalcogenides) can be electrochemically intercalated with organic quaternary alkylammonium cations. Subsequent solution-phase exfoliation of the intercalated compounds is realized by regular bath sonication for a short period (5-30 min) to produce free-standing, thin 2D nanosheets. It is also possible to graft additional ligands on the nanosheet surface. The thickness of the exfoliated nanosheets can be measured by using atomic force microscopy and Raman spectroscopy. Modifying the chemical structure and geometrical configuration of alkylammonium cations results in different exfoliation behavior and a family of versatile organic/inorganic hybrid superlattices with tunable physical/chemical properties. The whole protocol takes ~6 h for the successful production of stable, ultrathin 2D nanosheet dispersion in solution and another 11 h for depositing thin films and transferring them onto an arbitrary surface. This protocol does not require expertise beyond basic electrochemistry knowledge and conventional colloidal nanocrystal synthesis and processing.

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