Photonic materials prepared through the entrapment of quantum dots into silica

[Display omitted] Silica, which is appropriate as a matrix for developing photonic materials because of its optical transparency and mechanical strength, served here to entrap quantum dots (Qdots) by method of sol-gel chemistry. CdS was initially synthesized in aqueous solution. As ligand, mercaptos...

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Published inColloids and surfaces. A, Physicochemical and engineering aspects Vol. 536; pp. 3 - 9
Main Authors Postnova, Irina, Voznesenskiy, Sergei, Sergeev, Alexander, Galkina, Anna, Kulchin, Yury, Shchipunov, Yury
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.01.2018
Subjects
Cadmium sulfide
Photoluminescence
Photonic
Quantum dot
Silica
Sol-gel method
Photonic
Quantum dot
Cadmium sulfide
Sol-gel method
Silica
Photoluminescence
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Summary:[Display omitted] Silica, which is appropriate as a matrix for developing photonic materials because of its optical transparency and mechanical strength, served here to entrap quantum dots (Qdots) by method of sol-gel chemistry. CdS was initially synthesized in aqueous solution. As ligand, mercaptosuccinic acid was used for Qdot stabilization. Entrapped CdS held its photoluminescence properties in full measure. Synthesized Qdots were characterized in solution and silica matrix by TEM, SAXS, UV–vis and fluorescence spectroscopy. It was found that irradiation by laser resulted in a red shift of photoluminescence and an increase of the light absorbance. The effect is reversible. Dependence of optical properties of Qdots on the irradiation opens a way for developing photonic materials with regulated properties.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2017.09.020