Title

Facile fabrication of dendritic mesoporous SiO2@CdTe@SiO2 fluorescent nanoparticles for bioimaging

RIS ID

105825

Publication Details

Zhang, S., Wen, L., Yang, J., Zeng, J., Sun, Q., Li, Z., Zhao, D. & Dou, S. X. (2016). Facile fabrication of dendritic mesoporous SiO2@CdTe@SiO2 fluorescent nanoparticles for bioimaging. Particle and Particle Systems Characterization, 33 (5), 261-270.

Abstract

A seeded watermelon-like mesoporous nanostructure (mSiO2@CdTe@SiO2, mSQS) composed of a novel dendritic mesoporous silica core, fluorescent CdTe quantum dots (QDs), and a protective solid silica shell is successfully fabricated by loading QDs into dendritic mesoporous silica nanoparticles through electrostatic interaction, and then coating with a solid silica shell by the modified Stöber method. The shell thickness of mSQS can be tuned from 0 to 32 nm as desired by controlling the reaction parameters, including the amount of silica precursor, tetraethyl orthosilicate, that is introduced, the solvent ratio (H2O:ethanol), and the amount of catalyst (NH3·H2O). These fluorescent mSiO2@QDs@SiO2 nanoparticles possess excellent stability and thickness-dependent cytotoxicity, and are successfully applied to bioimaging. A seeded watermelon-like fluorescent mesoporous nanostructure (mSiO2@CdTe@SiO2) composed of a novel dendritic mesoporous silica core, fluorescent CdTe quantum dots, and a protective solid silica shell is successfully fabricated and applied to in vitro and in vivo bioimaging.

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/ppsc.201500254