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Facile Fabrication of Dendritic Mesoporous SiO 2 @CdTe@SiO 2 Fluorescent Nanoparticles for Bioimaging
Author(s) -
Zhang Shaohua,
Wen Ling,
Yang Jianping,
Zeng Jianfeng,
Sun Qiao,
Li Zhen,
Zhao Dongyuan,
Dou Shixue
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201500254
Subject(s) - tetraethyl orthosilicate , mesoporous silica , materials science , fluorescence , mesoporous material , nanoparticle , fabrication , nanotechnology , nanostructure , chemical engineering , quantum dot , cadmium telluride photovoltaics , coating , solvent , catalysis , chemistry , organic chemistry , medicine , physics , alternative medicine , pathology , quantum mechanics , engineering
A seeded watermelon‐like mesoporous nanostructure (mSiO 2 @CdTe@SiO 2 , 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 (H 2 O:ethanol), and the amount of catalyst (NH 3 ⋅H 2 O). These fluorescent mSiO 2 @QDs@SiO 2 nanoparticles possess excellent stability and thickness‐dependent cytotoxicity, and are successfully applied to bioimaging.