Robust superhydrophilic patterning of superhydrophobic ormosil surfaces for high-throughput on-chip screening applications

Beyazkılıç Ayas, Pınar
Tuvshindorj, Urandelger
Yildirim, Adem
Elbuken, Caglar
Bayindir, Mehmet
This article describes a facile method for the preparation of two-dimensionally patterned superhydrophobic hybrid coatings with controlled wettability. Superhydrophobic coatings were deposited from nanostructured organically modified silica (ormosil) colloids that were synthesized via a simple sol-gel method. On the defined areas of the superhydrophobic ormosil coatings, stable wetted micropatterns were produced using Ultraviolet/Ozone (UV/O) treatment which modifies the surface chemistry from hydrophobic to hydrophilic without changing the surface morphology. The degree of wettability can be precisely controlled depending on the UV/O exposure duration; extremely wetted spots with water contact angle (WCA) of nearly 0 degrees can be obtained. Furthermore, we demonstrated high-throughput biomolecular adsorption and mixing using the superhydrophilic patterns. The proposed superhydrophilic-patterned nanostructured ormosil surfaces with their simple preparation, robust and controlled wettability as well as adaptability on flexible substrates, hold great potential for biomedical and chemical on-chip analysis.


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Citation Formats
P. Beyazkılıç Ayas, U. Tuvshindorj, A. Yildirim, C. Elbuken, and M. Bayindir, “Robust superhydrophilic patterning of superhydrophobic ormosil surfaces for high-throughput on-chip screening applications,” RSC ADVANCES, vol. 6, no. 83, pp. 80049–80054, 2016, Accessed: 00, 2022. [Online]. Available: