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Preparation of Fluorescent SiO 2 Particles with Single CdTe Nanocrystal Cores by the Reverse Microemulsion Method
Author(s) -
Yang Y.,
Gao M. Y.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200500403
Subject(s) - tetraethyl orthosilicate , microemulsion , nanocrystal , materials science , fluorescence , cadmium telluride photovoltaics , condensation , orthosilicate , chemical engineering , spheres , nanotechnology , optics , pulmonary surfactant , physics , astronomy , engineering , thermodynamics
Highly fluorescent CdTe@SiO 2 core–shell‐structured spheres (see Figure) are prepared via hydrolysis and condensation of tetraethyl orthosilicate in water‐in‐oil emulsions. Systematic results reveal that the electrostatic interactions between negatively charged CdTe nanocrystals (NCs) and silica intermediates play a critical role in determining the final structures of the resultant particles. Following this mechanism, the number of CdTe NCs encapsulated in silica spheres is successfully tuned.