Designing a 2D van der Waals oxide with lone-pair electrons as chemical scissor
Year: 2024
Type: article
Abstract: ABSTRACT Two-dimensional (2D) van der Waals (vdW) materials are known for their intriguing physical properties, but their rational design and synthesis remain a great challenge for chemists. In this work, we successfully synthesized a new non-centrosymmetric oxide, i.e. InSbMoO6, with Sb3+ lone-pair electrons serving as chemical scissor to generate its 2D vdW crystal structure. Monolayer and few-layer InSbMoO6 flakes are readily obtained via facile mechanical exfoliation. They exhibit strong second-harmonic generation (SHG) response with an effective second-order nonlinear optical susceptibility $\chi _{{\rm{eff}}}^{{\rm{(2)}}}\ $of 32.4 pm·V−1. Meanwhile, the SHG response is in-plane anisotropic and directly proportional to the layer thickness, independent of layer parity. In addition, the InSbMoO6 flakes exhibit excellent thermal and atmospheric stability, along with pronounced anisotropy in Raman spectroscopy. This work implies that using lone-pair electrons as chemical scissor is an effective strategy for designing and synthesizing new 2D vdW materials for integrated photonic applications.
Source: National Science Review
DOI: 10.1093/nsr/nwae370
Authors: Zhipeng Du, Xu Chen, Wei Liu, Han Wang, Qianting Xu, Xiaoying Shang, Yipeng Song, Xueyuan Chen, Junhua Luo, Sangen Zhao
Institutions: Chinese Academy of Sciences, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, State Key Laboratory of Structural Chemistry, Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,100
Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, Natural Science Foundation of Fujian Province, Youth Innovation Promotion Association of the Chinese Academy of Sciences, Youth Innovation Promotion Association, Key Research Program of Frontier Science, Chinese Academy of Sciences
OpenAlex ID: W4403655220