Silica-Based Nanoparticles: Design and Properties
2010
A number of dye-doped silica nanoparticles (DDSNs) have been devel- oped by encapsulating various fluorophores into silica nanomatrixes. These DDSNs have shown great potential as highly sensitive fluorescent labeling agents for biosensing and bioimaging. The silica nanomatrix affects the radiative properties and reactivity of doped fluorophores and endows the DDSN surface properties of silica. Compared with molecular fluorophores, the DDSNs exhibit advantageous properties such as high fluorescence intensity, good photostability, and biological compatibility. In this chapter, methods for silica nanoparticle synthesis and approaches for doping dye molecules within the silica nanomatrixes are over- viewed. Various advantageous properties of DDSNs are discussed including reac- tion kinetics, solubility, photostability, quantum yield, lifetime, and toxicity.
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