Skip to main content Accessibility help

Patterned Functional Arrays by Selective De-Wetting

  • Hongyou Fan (a1), Dhaval Doshi (a1), Yunfeng Lu (a1), Gabriel P. Lopez (a1) and C. Jeffrey Brinker (a1)...


Using a micro-Contact Printing (μ-CP) technique, substrates are prepared with patterns of hydrophilic, hydroxyl-terminated SAMs and hydrophobic methyl-terminated SAMs. Beginning with a homogeneous solution of silica, surfactant, ethanol, water, and functional silane, preferential ethanol evaporation during dip-coating, causes water enrichment and selective de-wetting of the hydrophobic SAMs. Correspondingly, film deposition occurs exclusively on the patterned hydrophilic SAMs. In addition, by co-condensation of tetrafunctional silanes (Si(OR)4) with tri-functional organosilanes ((RO)3Si (CH2)3NH2), we have selectively derived the silica framework with functional amine NH2 groups. A pH sensitive, micro-fluidic system was formed by further conjugation reactions with pH sensitive dye molecules.



Hide All
[1] Yang, H., Coombs, N., Ozin, G. A., Nature 386 (1997) 692695.
[2] Trau, M., Yao, N., Kim, E., Xia, Y., Whitesides, G. M., Aksay, I. A., Nature 390 (1997) 674676.
[3] Yang, P. D., Deng, T., Zhao, D. Y., Feng, P. Y., Pine, D., Chmelka, B. F., Whitesides, G. M., Stucky, G. D., Science 282 (1998) 22442246.
[4] Lu, Y. F., Ganguli, R., Drewien, C. A., Anderson, M. T., Brinker, C. J., Gong, W. L., Guo, Y. X., Soyez, H., Dunn, B., Huang, M. H., Zink, J. I., Nature 389 (1997) 364368.
[5] Lu, Y. F., Fan, H. Y., Stump, A., Ward, T. L., Rieker, T., Brinker, C. J., Nature 398 (1999) 223226.
[6] Fan, H. Y., Lu, Y. F., Stump, A., Reed, S. T., Baer, T., Schunk, R., Perez-Luna, V., Lope, G. P., Brinker, C. J., Nature in press.
[7] Xia, Y. W. GM, Angew. Chem. Int. ED. 37 (1998) 550575.
[8] Xia, Y., Rogers, J., Paul, K., Whitesides, G., Chem. Rev. 99 (1999) 18231848.
[9] Zhao, D. Y., Huo, Q. S., Feng, J. L., Chmelka, B. F., Stucky, G. D., Journal of the American Chemical Society 120 (1998) 60246036.
[10] Yang, H., Kuperman, A., Coombs, N., Mamicheafara, S., Ozin, G. A., Nature 379 (1996) 703705.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed