Preparation of narrow size distribution CdS quantum dots in sodium borosilicate glass by the sol-gel process

Yu-Hua Kao; Kazutaka Hayashi; Ling Yu; Masayuki Yamane; John D. Mackenzie

doi:10.1117/12.189012

13 October 1994 Preparation of narrow size distribution CdS quantum dots in sodium borosilicate glass by the sol-gel process

Yu-Hua Kao, Kazutaka Hayashi, Ling Yu, Masayuki Yamane, John D. Mackenzie

Author Affiliations +

Proceedings Volume 2288, Sol-Gel Optics III; (1994) https://doi.org/10.1117/12.189012
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

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Yu-Hua Kao, Kazutaka Hayashi, Ling Yu, Masayuki Yamane, and John D. Mackenzie "Preparation of narrow size distribution CdS quantum dots in sodium borosilicate glass by the sol-gel process", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.189012

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