Sol-gel/rhodamine 6G composite films with tailored microstructures

Deborah L. Logan; Carol S. Ashley; Roger A. Assink; C. Jeffrey Brinker

doi:10.1117/12.132044

7 December 1992 Sol-gel/rhodamine 6G composite films with tailored microstructures

Deborah L. Logan, Carol S. Ashley, Roger A. Assink, C. Jeffrey Brinker

Proceedings Volume 1758, Sol-Gel Optics II; (1992) https://doi.org/10.1117/12.132044
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

A multi-step hydrolysis procedure was developed to prepare composite organic dye/sol-gel thin films with variable porosity for such applications as switches or sensors. Variation of acid and base catalyzed hydrolysis sequences of three sols prepared from tetraethoxysilane with identical H₂O/Si ratios, dilution factors, and pH resulted in considerably different silicate speciation. Under conditions where monomer was avoided, the refractive indices of as- deposited films could be varied by an aging step prior to film deposition. This general strategy, which relies on the aggregation of fractal polymeric clusters, is compatible with the low temperature and near neutral pH requirements of both organic dyes and biologically-active species such as enzymes.

Citation Download Citation

Deborah L. Logan, Carol S. Ashley, Roger A. Assink, and C. Jeffrey Brinker "Sol-gel/rhodamine 6G composite films with tailored microstructures", Proc. SPIE 1758, Sol-Gel Optics II, (7 December 1992); https://doi.org/10.1117/12.132044

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