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