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Silica-coating of quantum nanorods by a sol–gel process and their photo-bleaching properties

Silica-coating of quantum nanorods by a sol–gel process and their photo-bleaching properties This paper describes silica-coating of rod-structured nanoparticles composed of cadmium compounds, or quantum rods (QR), by means of a sol–gel method. QRs surface-modified with polyethyleneimine (PEI) (QR/PEI) had an average lateral size of 6.7 ± 0.9 nm and an average longitudinal size of 24.4 ± 2.5 nm. Silica-coated QR nanoparticles (QR/SiO2) were fabricated with a sol–gel process using water, sodium hydroxide, and tetraethylorthosilicate in ethanol in the presence of the QR/PEI nanoparticles. The QR/SiO2 nanoparticles were core-shell particles composed of the QRs as the core, the PEI as the matrix, and the silica as the shells. The colloid solution of QR/SiO2 nanoparticles showed more stable fluorescence to aging in a dark box in atmosphere at room temperature than that of QR/PEI nanoparticles. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Sol-Gel Science and Technology Springer Journals

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Ceramics, Glass, Composites, Natural Materials; Inorganic Chemistry; Optical and Electronic Materials; Nanotechnology
ISSN
0928-0707
eISSN
1573-4846
DOI
10.1007/s10971-018-4674-2
Publisher site
See Article on Publisher Site

Abstract

This paper describes silica-coating of rod-structured nanoparticles composed of cadmium compounds, or quantum rods (QR), by means of a sol–gel method. QRs surface-modified with polyethyleneimine (PEI) (QR/PEI) had an average lateral size of 6.7 ± 0.9 nm and an average longitudinal size of 24.4 ± 2.5 nm. Silica-coated QR nanoparticles (QR/SiO2) were fabricated with a sol–gel process using water, sodium hydroxide, and tetraethylorthosilicate in ethanol in the presence of the QR/PEI nanoparticles. The QR/SiO2 nanoparticles were core-shell particles composed of the QRs as the core, the PEI as the matrix, and the silica as the shells. The colloid solution of QR/SiO2 nanoparticles showed more stable fluorescence to aging in a dark box in atmosphere at room temperature than that of QR/PEI nanoparticles.

Journal

Journal of Sol-Gel Science and TechnologySpringer Journals

Published: May 15, 2018

References