Fig. 4.
Schematic representation of SiNPs. Types of SiNPs for delivering biologically active agents and drugs. Targeting moieties on the surface of SiNPs or magnetic composites. SiNPs responding to stimuli (e.g. pH, glutathione, magnetic field, light and temperature). SiNPs for optical, magnetic resonance and other bioimaging applications. “Reprinted from Mebert et al. [97] Copyright (2017), with permission from Elsevier”.