Precisely Self-assembly and Controlled Catalysis of Thermoresponsive Core-Satellite Multicomponent Hybrid Nanoparticles.

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, the feeding ratio of AuNPs and the core nanoparticle. It is worth to note that multi-layered core-satellite nanostructures have been fabricated by high feeding ratio of AuNPs and 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 nanoparticles size, temperature and polymer feed ratio. This versatile strategy for precisely construction of core-satellite nanostructures would open a new pathway to construct multicomponent functional nanostructures.