Lv Yuanchao, Xiong Zhile, Yao Yinan, Ren Ang, Xiang Shengchang, Zhao Yong Sheng, Zhang Zhangjing
Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China.
Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Chemistry. 2021 Feb 15;27(10):3297-3301. doi: 10.1002/chem.202005217. Epub 2021 Jan 12.
MOF-based one-dimensional materials have received increasing attention in the nanophotonics field, but it is still difficult in the flexible shape evolution of MOF micro/nanocrystals for desired optical functionalities due to the susceptible solvothermal growth process. Herein, we report on the well-controlled shape evolution of pure-MOF microcrystals with optical waveguide and lasing performances based on a bottom-up and top-down synergistic method. The MOF microcrystals from solvothermal synthesis (bottom-up) enable the evolution from microrods via microtubes to nanowires through a chelating agent-assisted etching process (top-down). The three types of MOF 1D-microstructures with high crystallinity and smooth surfaces all exhibit efficient optical waveguide performance. Furthermore, MOF nanowire with lowest propagation loss served as low-threshold pure-MOF nanolasers with Fabry-Pérot resonance. These results advance the fundamental understanding on the controlled MOF evolution mechanism, and offer a valuable route for the development of pure-MOF-based photonic components with desired functionalities.
基于金属有机框架（MOF）的一维材料在纳米光子学领域受到了越来越多的关注，但由于易受影响的溶剂热生长过程，MOF微/纳米晶体的灵活形状演变为所需光学功能仍然很困难。在此，我们基于自下而上和自上而下的协同方法，报道了具有光波导和激光性能的纯MOF微晶的良好控制的形状演变。溶剂热合成（自下而上）得到的MOF微晶通过螯合剂辅助蚀刻过程（自上而下）实现了从微棒到微管再到纳米线的演变。三种具有高结晶度和光滑表面的MOF一维微结构均表现出高效的光波导性能。此外，具有最低传播损耗的MOF纳米线用作具有法布里-珀罗共振的低阈值纯MOF纳米激光器。这些结果推进了对可控MOF演变机制的基本理解，并为开发具有所需功能的纯MOF基光子组件提供了一条有价值的途径。
