journal article·2021-11

Solvent‐Assisted Anisotropic Cleavage of Transition Metal Carbide into 2D Nanoflakes

Chen-Xia Hu, Zhen Tian, Qi Xiao, Zhen-Tong Zhu, Xiang-Yang Li, Guan-Hua Dun, Hao-Ran Wu, Yu-Long Tang, Qiang Wang, Hao-Li Zhang

Small Structures· Volume 2· Issue 11
Publisher page

Abstract

Mechanical exfoliation of bulk layered materials into atomic‐layer thin nanosheets has become a general strategy to obtain 2D nanomaterials, which seems intuitively unsuitable for non‐van der Waals crystals. However, a new method is proposed, namely, solvent‐assisted anisotropic cleavage (SAAC), for producing thin nanostructures from transition metal carbides (TMCs), including titanium carbide (TiC) and tungsten carbide (WC). The SAAC method harnesses the intrinsic anisotropic hardness properties of the TMC and enables efficient cleavage of bulk TMC into 2D layers. Under ultrasonication in appropriated solvent, TiC crystals show preferable cleavage along [110] direction and produce 2D nanoflakes. The obtained 2D nanoflakes are successfully applied for ultrafast photonics as saturable absorbers (SAs) in mode‐locked thulium fiber lasers, where stable third‐order harmonically mode‐locked dissipative solitons are realized at 2 μm. The success of the SAAC process opens a new pace toward preparation of 2D nanomaterials.
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Research context

OpenAlex topics: Advanced Fiber Laser Technologies · Diamond and Carbon-based Materials Research · Mechanical and Optical Resonators

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

Affiliations

State Key Laboratory of Applied Organic Chemistry Key Laboratory of Special Function Materials and Structure Design College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China

Key Laboratory for Laser Plasmas (MOE) Department of Physics and Astronomy Collaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China

School of Physics Sciences and Information Technology Liaocheng University Liaocheng 252000 China

College of chemistry and chemical engineering Northwest Normal University Lanzhou 730000 China

Institute of Microelectronics Tsinghua University Beijing 100084 China

Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Tianjin University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shanghai

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