Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-22T15:58:17.904Z Has data issue: false hasContentIssue false
  • English
  • Français

Sol-Gel-Derived Silica Films With Tailored Microstructures for Applications Requiring Organic Dyes

Published online by Cambridge University Press:  21 February 2011

Monica N. Logan ,
S. Prabakar  and
C. Jeffrey Brinker
Monica N. Logan
Affiliation:
Department 1846, M. S. 0607, Sandia National Laboratories, Albuquerque, NM 87185–5800
S. Prabakar
Affiliation:
UNM/NSF Center for Micro-Engineered Ceramics, The University of New Mexico, Albuquerque, NM 87131
C. Jeffrey Brinker
Affiliation:
Department 1846, M. S. 0607, Sandia National Laboratories, Albuquerque, NM 87185–5800 UNM/NSF Center for Micro-Engineered Ceramics, The University of New Mexico, Albuquerque, NM 87131
Get access

Abstract

A three-step sol-gel process was developed to prepare organic dye-doped thin films with tailored porosity for applications in chemical sensing and optoelectronics. Varying the acid- and base-catalyzed hydrolysis steps of sols prepared from tetraethoxysilane with identical final H2O/Si ratios, dilution factors and pH resulted in considerably different distributions of the silicate polymers in the sol (determined by 29Si NMR) and considerably different structures for the polymer clusters (determined by SAXS). During film formation these kinetic effects cause differences in the packing and collapse of the silicate network, leading to thin films with different refractive indices and volume fraction porosities. Under conditions where small pore-plugging species were avoided, the porosities of as-deposited films could be varied by aging the sol prior to film deposition. This strategy, which relies on the growth and aggregation of fractal polymeric clusters, is compatible with the low temperature and near neutral pH requirements of organic dyes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 115
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1 Avnir, D., Braun, S., Lev, O. and Ottolenghi, M. in Sol-Gel Optics II. edited by Mackenzie, J.D. (SPIE Proc. 1758, Bellingham, WA, 1992) pp. 456–463.Google Scholar
2 Lev, O., Kuyavskaya, B.I., et al. in Environmental Monitoring, edited by Vo-Dink, T. (SPIE Proc. 1716, Bellingham, WA, 1992).Google Scholar
3 Iosefzon-Kuyavskaya, B., Gigozin, I., et al. , J. Non-Cryst. Solids 147–148, 808–812 (1992).Google Scholar
4 Prasad, P.N. in Sol-Gel Optics, edited by Mackenzie, J.D. and Ulrich, D.R. (SPIE Proc. 1328, Bellingham, WA, 1990) pp. 168–173.Google Scholar
5 Reisfeld, R. in Sol-Gel Science and Technology, edited by Aegerter, M.A., Jafelicci, M. Jr., et al. (World Scientific, Singapore, 1989) pp. 323–345.Google Scholar
6 Dunn, B., Mackenzie, J.D., Zink, J.I. and Stafsudd, O.M. in Sol-Gel Optics, edited by Mackenzie, J.D. and Ulrich, D.R. (SPIE Proc. 1328, Bellingham, WA, 1990) pp. 174–182.Google Scholar
7 Levy, D., Einhorn, S. and Avnir, D., J. Non-Cryst. Solids 113, 137–145 (1989).Google Scholar
8 Brinker, C.J., Frye, G.C., Hurd, A.J. and Ashley, C.S., Thin Solid Films 201, 97–108 (1991).Google Scholar
9 Brinker, C.J., Hurd, A.J., Frye, G.C., Schunk, P.R.and Ashley, C.S., J. of the Ceram. Soc. of Japan 99 (10), 862–877 (1991).Google Scholar
10 Logan, D.L., Ashley, C.S. and Brinker, C.J. in Better Ceramics Through Chemistry V. edited by Hampden-Smith, M., Klemperer, W.G. and Brinker, C.J. (Mat. Res. Soc. Proc. 271, Pittsburgh, PA, 1992) pp. 541–546.Google Scholar
11 Logan, D.L., Ashley, C.S., Assink, R.A. and Brinker, C.J. in Sol-Gel Optics II. edited by Mackenzie, J.D. (SPIE Proc. 1758, Bellingham, WA, 1992) pp. 519–528.Google Scholar
12 Mandelbrot, B.B., The Fractal Geometry of Nature (W.H. Freeman, New York, 1983).Google Scholar
13 Brinker, C.J. and Scherer, G.W., Sol-Gel Science (Academic Press, San Diego, CA, 1990) pp. 360–370 and 799–811.Google Scholar
14 Brinker, C.J., Keefer, K.D., Schaefer, D.W. and Ashley, C.S., J. Non-Cryst. Solids 48 (1), 47–64 (1982).Google Scholar
15 Brinker, C.J., Keefer, K.D., et al. , J. Non-Cryst. Solids 63, 45–59 (1984).Google Scholar
16 Brinker, C.J., Raman, N.K., Logan, D.L., Sehgal, R., Ward, T.L., Wallace, S. and Assink, R.A., Polymer Preprints 34 (1), 240–241 (1993).Google Scholar
17 Goodnow, D.C. and Logan, M.N., unpublished results.Google Scholar
18 Born, M. and Wolf, E., Principles of Optics (Pergamon, New York, 1975) p. 87.Google Scholar
19 Gonzales, M. and Logan, M.N., unpublished results.Google Scholar
20 Doughty, D.H., Assink, R.A. and Kay, B.D. in Silicon-Based Polymer Science: A Comprehensive Resource, edited by Zeigler, J.M. and Fearon, F.W.G. (Amer. Chem. Soc. Advances in Chemistry Series No. 224, 1990) pp. 241–250.Google Scholar