journal article·2024-01-10

Confined VLS Growth of Single-Layer 2D Tungsten Nitrides

Hao-Ting Chin, Deng-Chi Wang, Hao Wang, Jeyavelan Muthu, Farheen Khurshid, Ding-Rui Chen, Mario Hofmann, Feng-Chuan Chuang, Ya-Ping Hsieh

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Abstract

Two-dimensional (2D) metal nitrides have garnered significant interest due to their potential applications in future electronics and quantum systems. However, the synthesis of such materials with sufficient uniformity and at relevant scales remains an unaddressed challenge. This study demonstrates the potential of confined growth to control and enhance the morphology of 2D metal nitrides. By restricting the reaction volume of vapor-liquid-solid reactions, an enhanced precursor concentration was achieved that reduces the nucleation density, resulting in larger grain sizes and suppression of multilayer growth. Detailed characterization reveals the importance of balancing the energetic and kinetic aspects of tungsten nitride formation toward this ability. The introduction of a promoter enabled the realization of large-scale, single-layer tungsten nitride with a uniform and high interfacial quality. Finally, our advance in morphology control was applied to the production of edge-enriched 2D tungsten nitrides with significantly enhanced hydrogen evolution ability, as indicated by an unprecedented Tafel slope of 55 mV/dec.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Electronic and Structural Properties of Oxides

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

Affiliations

Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan

International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei 10617, Taiwan

Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan

Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan

Department of Physics, National Taiwan University, Taipei 106, Taiwan

Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan

Center for Theoretical and Computational Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan

Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan

Funding

Ministry of Science and Technology · Academia Sinica · National Center for Theoretical Sciences · National Science and Technology Council

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