2D Quasi-Layered Material with Domino Structure

Author:

Lan Haihui1,Wang Luyang1,He Runze1,Huang Shuyi1,Yu Jinqiu1,Luo Jingrui1,Li Yiling1,Lin Jiaxin1,Zhang Shunping2ORCID,Zeng Mengqi1ORCID,Fu Lei1ORCID

Affiliation:

1. Wuhan University

2. School of Physics and Technology, Wuhan University

Abstract

Abstract Interlayer coupling strength dichotomizes two-dimensional (2D) materials into layered and non-layered types. Traditionally, they can be regarded as atomic layers intrinsically linked via van der Waals (vdW) forces or covalent bonds, oriented orthogonally to their growth plane. In our work, we report an unprecedented material system that differentiates from layered and non-layered materials, termed quasi-layered domino-structured (QLDS) materials. Considering the skewed structure, the force orthogonal to the 2D QLDS-GaTe growth plane constitutes a synergistic blend of vdW forces and covalent bonds, with neither of them being perpendicular to the 2D growth plane. This feature endows remarkable anisotropy, second harmonic generation enhancement with a staggering susceptibility of 394.3 pm V−1, and outstanding hydrogen evolution reaction catalytic activity with an ultra-low overpotential of 41 mV at 10 mA cm−2 and a modest Tafel slope of 73 mV dec−1. These findings endow further applications arranged in nonlinear optics, sensors, and catalysis.

Publisher

Research Square Platform LLC

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