Inorganic Micro/Nanocarriers

Inorganic micro- and nanoparticles, such as QDs, polystyrene, magnetic, ceramic, and metallic nanoparticles, contain a central core composed of inorganic materials that define their fluorescent, magnetic, electronic, and optical properties [34]. Carbon nanotubes and fullerene may be categorized as inorganic nanoparticles. The rigid outer surface and the durable core of these inorganic carriers can be complexed with a variety of drug/active agent payloads.

Quantum Dots

QDs are colloidal fluorescent semiconductor nanocrystals (2—10 nm) with narrow emission and a broad range of absorption bands. This material is predominantly used in fabricating imaging probes [68]. The central core of QDs consists of combinations of elements from groups II—VI of the periodic system (CdSe, CdTe, CdS, PbSe, ZnS, and ZnSe) or III—V (GaAs, GaN, InP, and InAs), which are “overcoated” with a layer of ZnS. QDs are photostable, and resistant to photobleaching. These dots show exceptional resistance to photo and chemical degradation. These properties render QDs excellent contrast agents for imaging and labels for bioassays [69].

< Prev   CONTENTS   Source   Next >