Covalently Silane-Functionalized Antimonene Nanosheets and Their Copolymerized Gel Glasses for Broadband Vis-NIR Optical Limiting
Covalently Silane-Functionalized Antimonene Nanosheets and Their Copolymerized Gel Glasses for Broadband Vis-NIR Optical Limiting
复制标题
用于宽带可见光近红外光限幅的共价硅烷官能化锑烯纳米片及其共聚凝胶玻璃
DOI：
10.1021/acsami.0c18738
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发表时间：
2021-01-13
影响因子：
9.5
通讯作者：
Xie, Zheng
中科院分区：
文献类型：
--
作者：
Xing, Fangyuan;Wang, Jingjing;Xie, Zheng
二维锑具有高迁移率、高稳定性和带隙可调等优点，具有广阔的应用前景。锑的共价化学和锑的分子掺杂或杂化对于进一步的应用仍然是不完整的。本工作设计并制备了硅烷功能化锑纳米片材及其共聚有机改性硅酸盐凝胶玻璃。实验数据证实了3-缩水甘油基丙基三甲氧基硅烷与锑发生了共价相互作用。与未官能化的锑相比，硅烷官能化的锑在溶剂和凝胶基质中具有更高的浓度、更高的相容性和分散稳定性。特别是，功能化锑纳米片在凝胶玻璃中的掺杂浓度可达2%，高于传统的纳米复合材料和纳米杂化材料。这些纳米薄膜在可见光和长波近红外区域(532-2150 nm)表现出出色的光限幅性能。光限幅机制是由非线性吸收、非线性折射和非线性散射共同作用的结果。硅烷功能化的锑纳米片材及其共聚杂化材料将在光电子学、生物、能源等领域具有广阔的应用前景。
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-glycidoxypropyltrimethox-ysilane 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.