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Journal of Sol-Gel Science and Technology
Erschienen in: Journal of Sol-Gel Science and Technology 1/2010

01.07.2010 | Original Paper

Direct coating of quantum dots with silica shell

verfasst von: Yoshio Kobayashi, Takuya Nozawa, Tomohiko Nakagawa, Kohsuke Gonda, Motohiro Takeda, Noriaki Ohuchi, Atsuo Kasuya

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 1/2010

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Abstract

This paper describes a method for direct coating of fluorescent semiconductor nanoparticles with silica shell. The fluorescent semiconductor nanoparticles used were CdSe x Te1–x nanoparticles coated with ZnS and succeedingly surface-modified with carboxyl groups, or quantum dots (Q-dots). The Q-dots were silica-coated by performing sol–gel reaction of tetraethyl orthosilicate (TEOS) using NaOH as a catalyst in the presence of the Q-dots. Quasi-perfect Q-dots/silica core-shell particles were formed at 5.0 M H2O and 4.0 × 10−4 M NaOH. Under these concentrations of H2O and NaOH, the particle size of Q-dots/silica particles could be varied from 20.1 to 38.1 nm as the TEOS concentration increased from 2.5 × 10−4 to 50 × 10−4 M. The Q-dots/silica particles showed fluorescence as well as the uncoated Q-dots.
Vorheriger Artikel Comparison of hydrophobicity studies of silica aerogels using contact angle measurements with water drop method and adsorbed water content measurements made by Karl Fischer’s titration method
Nächster Artikel Organic–inorganic hybrid melting gels

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Metadaten
Titel
Direct coating of quantum dots with silica shell
verfasst von
Yoshio Kobayashi
Takuya Nozawa
Tomohiko Nakagawa
Kohsuke Gonda
Motohiro Takeda
Noriaki Ohuchi
Atsuo Kasuya
Publikationsdatum
01.07.2010
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 1/2010
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-010-2218-5

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