文献类型：期刊文献

英文题名：Precise Self-Assembly and Controlled Catalysis of Thermoresponsive Core-Satellite Multicomponent Hybrid Nanoparticles

作者：Tian, Jia[1];Huang, Baoxuan[1];Zhang, Weian[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2019

卷号：35

期号：1

起止页码：266

外文期刊名：LANGMUIR

收录：;EI(收录号：20190106336978);WOS:【SCI-EXPANDED(收录号:WOS:000455558000028)】；

基金：This work was financially supported by the National Natural Science Foundation of China (grant number 21574039 and 51803058) and partially by an Alexander-von-Humboldt Fellowship (J.T.). J.T. thanks Prof. Philipp Vana (Georg August -University Gottingen, Germany) for the host of Alexander-von-Humboldt Fellowship. We are indebted to Prof. Axel H. E. Muller (Gutenberg-Universitat Mainz, Germany) for stimulating ideas regarding to the magnetic analytical solution.

语种：英文

外文关键词：Magnetite - Satellites - Silica - Catalysis - Living polymerization - Self assembly

摘要：The construction of multicomponent hybrid nanomaterials with well-controlled architecture, especially bearing an ordered homogeneity and distribution of the subunits with tunable functions, is a key challenge in chemistry and material science. Herein, we reported a versatile and novel strategy to fabricate core-satellite multicomponent nanostructures with tunable interparticle distances and catalysis properties by the combination of surface-initiated reversible addition-fragmentation chain transfer (SI-RAFT) polymerization and self-assembly. The arrangement and interparticle distance of gold satellites could be precisely tuned by the SI-RAFT polymerization process and the feeding ratio of gold nanoparticles (AuNPs) and the core nanoparticle. It is worth to note that multilayered core-satellite nanostructures have been fabricated by a high-feeding ratio of AuNPs and magnetite NP (MNP)@SiO2-PNIPAm. Notably, the core-satellite MNP@SiO2-PNIPAm-Au nanoparticles exhibited excellent thermoresponsive behaviors with the change of temperature. Furthermore, the catalytic efficiency of MNP@SiO2-PNIPAm-Au nanoparticles via the reduction of 4-nitrophenol to 4-aminophenol can be well modulated by the nanoparticle size, temperature, and polymer feed ratio. This strategy for precise construction of core-satellite nanostructures would open a new pathway to construct multicomponent functional nanostructures.