文献类型：期刊文献

英文题名：Freely Tailorable Yolk-Shell Encapsulation: Versatile Applications in Ultralow-k Dielectric, Drug Delivery Systems, and Catalysts

作者：Zhang, Zhe[1];He, Peng[1];Ma, Wenjun[1];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

年份：2023

卷号：33

期号：33

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20231713949564);WOS:【SCI-EXPANDED(收录号:WOS:000971668300001)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (52073091, 22171086), Natural Science Foundation of Shanghai (20ZR1414600), and the Fundamental Research Funds for the Central Universities (JKD01221701). This work was also sponsored by Shanghai Pujiang Program (22PJ1402500).

语种：英文

外文关键词：drug delivery systems; mesoporous silica nanoparticles; nanocatalysts; ultralow-dielectric constant; yolk-shell structures

摘要：Herein, a facile, controllable, and versatile method is reported to prepare monodisperse yolk-shell and yolk-multishell silica nanoparticles (NPs) with mesoporous shells by a novel selective etching strategy. The mechanism of selective etching based on fluoride-silica chemistry is investigated in detail and thus provides a fundamentally novel principle for the fabrication of yolk-shell NPs. Specifically, this unprecedented and versatile synthesis strategy can be used to encapsulate essentially any silica-based, carbon-based, metal, metal oxide, or other possible NPs. Noteworthy is that most of the yolk-shell mesoporous silica (mSiO(2)) NPs are prepared for the first time. To demonstrate the major structural and compositional advantages of the designed yolk-shell NPs, their applications in the fields of ultralow-dielectric constant (k) materials, drug delivery systems, and catalysts were explored. In detail, the lowest k value of the prepared yolk-shellordered mesoporous silica@mSiO(2)/fluorinated polybenzoxazole composite films is 2.02; The obtained yolk-shell mSiO(2)/C@mSiO(2)/C NPs possess high hydrophilicity and pH-responsive sensitivity; The conversion of the catalytic reaction of the designed magnetic yolk-shell hollow Fe3O4@SiO2/Au@mSiO(2) NPs at 20 min is 97% with a high conversion rate (92%) and recyclability even after 10 reuses. This innovative work lays a solid foundation for freely tailorable yolk-shell encapsulation and will greatly stimulate more efforts devoted to relevant research and development.