Abstract
In this work, we developed an unexplored enzyme-responsive core-shell nanogel via the assembly of hydrogelators at the surface of silicon nanoparticles. The immobilized carboxylesterase at the surface of silicon nanoparticles can catalyse precursors into hydrogelators, self-assembling around the surface of silicon nanoparticles owing to its surface confinement effect. These novel phenomena can be confirmed by observation of their morphology and increased diameters through scanning electron microscopy, transmission electron microscopy and dynamic light scattering. Moreover, these resulting core-shell nanogels can achieve controlled growth of the gel layer by means of changing the concentrations of precursors. Because of their good biocompatibility, these nanogels can realize applications in enzyme-specific drug delivery as nanocarriers.
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