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Proceedings Paper

Preparation of narrow size distribution CdS quantum dots in sodium borosilicate glass by the sol-gel process
Author(s): Yu-Hua Kao; Kazutaka Hayashi; Ling Yu; Masayuki Yamane; John D. Mackenzie
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Paper Abstract

Successful fabrication of nonlinear optical devices such as nonlinear waveguides and switches requires high nonlinearity of semiconductor quantum dot nanocomposites and their ability to form waveguides. Nano-sized CdS quantum dots with narrow size distribution can be fabricated via the sol-gel process by using a bifunctional ligand which anchors the Cd2+ ions homogeneously to the matrix. In this investigation, 3- aminopropyltriethoxysilane, H2N(CH2)3Si(OCCH5)3, has been used to synthesize CdS quantum dots with small diameters and narrow size distributions in sodium borosilicate gels and fully dense glasses. This matrix composition allows waveguide fabrication by ion exchange of sodium with potassium and has the advantage of low- temperature densification to form optical quality glasses. In 8 nominal wt% CdS-doped 5Na2O-30B2O3-65SiO2 glass, the dots have an average size of 2.8 nm, a maximum in the distribution in the range of 2.0 - 2.5 nm, and a standard deviation of 0.9.

Paper Details

Date Published: 13 October 1994
PDF: 13 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.189012
Show Author Affiliations
Yu-Hua Kao, Univ. of California/Los Angeles (United States)
Kazutaka Hayashi, Univ. of California/Los Angeles (United States)
Ling Yu, Univ. of California/Los Angeles (United States)
Masayuki Yamane, Tokyo Institute of Technology (Japan)
John D. Mackenzie, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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