DataVXAdvanced MaterialsPaper
journal article·2025-02

Two‐dimensional Nanosheets by Liquid Metal Exfoliation

Yichao Bai, Youan Xu, Linxuan Sun, Zack Ward, Hongzhang Wang, Gothamie Ratnayake, Cong Wang, Mingchuang Zhao, Haoqi He, Jianxiang Gao, Menghan Wu, Sirong Lu, George Bepete, Deli Peng, Bilu Liu, Feiyu Kang, Humberto Terrones, Mauricio Terrones, Yu Lei

Advanced Materials· Volume 37· Issue 8
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Source abstract

Abstract

Abstract Liquid exfoliation is a scalable and effective method for synthesizing 2D nanosheets (NSs) but often induces contamination and defects. Here, liquid metal gallium (Ga) is used to exfoliate bulk layered materials into 2D NSs at near room temperature, utilizing the liquid surface tension and Ga intercalation to disrupt Van der Waals (vdW) forces. In addition, the process can transform the 2H‐phase of transition metal dichalcogenides into the 1T’‐phase under ambient conditions. This method produces high aspect ratio, surfactant‐free 2D‐NSs for more than 10 types of 2D materials that include h‐BN, graphene, MoTe2, MoSe2, layered minerals, etc. The subsequent Ga separation via ethanol dispersion avoids the formation of additional defects and surfactant contamination. By adjusting initial defect levels of the layered materials, customize the metallicity and/or defectiveness of 2D NSs can be customized for applications such as birefringence‐tunable modulators with exfoliated h‐BN, and enhanced hydrogen evolution with defective MoS2. This approach offers a strategy to optimize liquid metal/2D interfaces, preserving intrinsic properties and enabling practical applications, potentially transforming optics, energy conversion, and beyond.
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Research context

Nanomaterials

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Research Center of Double Helix Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials Shenzhen Key Laboratory of Advanced Layered Materials for Value‐added Applications Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P. R. China

Xi'an Research institute of High Technology Xi'an 710025 P. R. China

Department of Physics and Astronomy, Rensselaer Polytechnic Institute Rensselaer NY 12180 USA

Department of Physics Department of Chemistry Department of Materials Science and Engineering Center for 2D and Layered Materials The Pennsylvania State University University Park PA 16802 USA

Southern University of Science and Technology Shenzhen 518055 China

Department of Chemical and Materials Engineering Department of Physics and Centre for Nano Science Research (CeNSR) Concordia University Montreal H4B1R6 Canada

Institute of Superlubricity Technology Research Institute of Tsinghua University in Shenzhen Shenzhen 518057 China

Shenzhen Geim Graphene Center Tsinghua‐Berkeley Shenzhen Institute and Institute of Materials Research Shenzhen Key Laboratory of Advanced Layered Materials for Value‐added Applications Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P. R. China

Funding

National Key Research and Development Program of China · National Science Fund for Distinguished Young Scholars · National Natural Science Foundation of China

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