Confined growth with particle attachment driven self-sieving for enhanced cascade reaction via versatile core-shell-shell nanocomposites

Abstract

Controlling formation of metal organic frameworks (MOFs) with embedded enzymes on magnetic surface has been achieved by a confined growth with particle attachment driven self-sieving approach for the first time. Specifically, a versatile route of silica encapsulation guided enzyme assembly for formation of ZIF-8 shell has been successfully demonstrated by shaped-controllable Fe3O4 nanoparticles, e.g., nanorod and nanocube. Interestingly, silica encapsulation can lead to structural diversity of ZIF-8 shell on the shaped-controllable Fe3O4 nanoparticles for affecting properties of the nanocomposites. Furthermore, embedded enzymes confined between silica endoskeleton and ZIF-8 exoskeleton can participate in cascade reaction with different activities and stabilities in the terms of plasmonic assemblies fabrication and cancer cell catalytic therapy. As a result, a circulation plasmonic fabrication and cancer therapy can be achieved via the magnetic nanocomposites. It can be expected that the confined growth with particle attachment driven self-sieving method can be versatile to generate diverse MOFs shell encapsulated shaped-controllable nanoparticles for efficiently embedding enzyme in the nanocomposites.