Xing Fangyuan, Wang Jingjing, Wang Zhen, Li Yunfei, Gou Xiaofeng, Zhang Hailong, Zhou Shuyun, Zhao Junlong, Xie Zheng
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China.
ACS Appl Mater Interfaces. 2021 Jan 13;13(1):897-903. doi: 10.1021/acsami.0c18738. Epub 2020 Dec 18.
Two-dimensional antimonene has many potential applications for its high mobility, high stability, and tunable band gap. The covalent chemistry of antimonene and the molecular doping or hybrid of antimonene remain incomplete for further applications. In this work, silane-functionalized antimonene nanosheets and their copolymerized organically modified silicate gel glasses are designed and prepared. The experimental data confirmed that 3-glycidoxypropyltrimethoxysilane interacts covalently with antimonene. Compared with unfunctionalized antimonene, the silane-functionalized antimonene shows higher concentration, higher compatibility, and dispersion stability in solvents and gel matrices. In particular, the doping concentration of functionalized antimonene nanosheets can reach 2% in gel glass, which is larger than conventional nanocomposites and nanohybrids. These nanosheets exhibit outstanding optical limiting performance in the visible and long-wavelength near-infrared regions (532-2150 nm). The mechanism of optical limiting is found to be a combination of nonlinear absorption, nonlinear refraction, and nonlinear scattering. The silane-functionalized antimonene nanosheets and their copolymerized hybrids will be promising materials for optoelectronics, biology, energy, and others.
二维锑烯因其高迁移率、高稳定性和可调节带隙而具有许多潜在应用。锑烯的共价化学以及锑烯的分子掺杂或杂化对于进一步应用而言仍不完善。在这项工作中，设计并制备了硅烷功能化的锑烯纳米片及其共聚的有机改性硅酸盐凝胶玻璃。实验数据证实，3-缩水甘油氧基丙基三甲氧基硅烷与锑烯发生共价相互作用。与未功能化的锑烯相比，硅烷功能化的锑烯在溶剂和凝胶基质中表现出更高的浓度、更高的相容性和分散稳定性。特别是，功能化锑烯纳米片在凝胶玻璃中的掺杂浓度可达2%，这高于传统的纳米复合材料和纳米杂化物。这些纳米片在可见光和长波长近红外区域（532 - 2150 nm）表现出优异的光限幅性能。发现光限幅机制是非线性吸收、非线性折射和非线性散射的组合。硅烷功能化的锑烯纳米片及其共聚杂化物将成为用于光电子学、生物学、能源等领域的有前途的材料。
