文献类型：期刊文献

英文题名：Revealing electrostatic-manipulated self-assembly mechanism helps to readily design enhanced MOF-derived microwave absorbers

作者：Wu, Xiaohan[1];Lin, Jingyu[1];He, Yu[1];Wang, Ruoqi[1];Zhou, Yukang[1];Qi, Huimin[1];Chen, Yi[2];Zuo, Peiyuan[1];Liu, Xiaoyun[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai 200237, Peoples R China;[2]Shanghai Spaceflight Precis Machinery Inst, Shanghai 201108, Peoples R China

年份：2024

卷号：227

外文期刊名：CARBON

收录：;EI(收录号：20242216178885);WOS:【SCI-EXPANDED(收录号:WOS:001247159300002)】；

基金：All authors are grateful for financial support from the National Natural Science Foundation of China (52073091, 52373073, 52303083, 22171086) , Shanghai Pujiang Program (22PJ1402500) , Shanghai Rising-Star Program (Program No. 21QA1403900) , and the Key Laboratory of Advanced Polymeric Materials of Shanghai.

语种：英文

外文关键词：Controllable self-assembly; Microwave absorbers; Electrostatic adsorption and repulsion; Hollow porous microstructures

摘要：The controllable self-assembly of Metal Organic Frameworks (MOFs) crystals plays a vital role in modulating the performance for microwave absorbers. However, most current strategies require colloidal or intricate chemical modifications of nanoparticles, thereby increasing the complexity of structural construction and impeding the broader application of microwave absorbers. To resolve this tough issue, we herein innovatively propose a more easily achievable electrostatic-manipulated self-assembly strategy. By readily manipulating the electrostatic adsorption and repulsion between particles, the aggregation and growth sites of initial MOF crystals are anchored, hence facilitating to the construction of solid-core/shell and hollow porous microstructures for absorbers. The substantial improvement depending on electrostatic effects is clearly observed in experimental results. It demonstrates that the Co@hollow N-doped carbon spheres (Co@HNCSs) absorber, induced by electrostatic repulsion, shows the best overall absorption performance, with a strong absorption of -65.4 dB at a thickness of 1.9 mm and an effective absorption bandwidth (EAB) of 5.4 GHz at a thickness of 1.6 mm, covering almost the entire Ku band. The influence of these strategies on the electromagnetic response mechanisms is further comprehensively discussed. Accordingly, we believe this strategy offers new insights for the MOFs' structural absorbers via electrostatic-manipulated self-assembly strategy.