Related Experiment Video
Updated: Jun 10, 2026
08:19
Patterning via Optical Saturable Transitions - Fabrication and Characterization
Published on: December 11, 2014
UV/thermally driven rewritable wettability patterns on TiO2-PDMS composite films.
Kazuya Nakata1, Hiroaki Kimura, Munetoshi Sakai
1Photocatalyst Group, Kanagawa Academy of Science and Technology, KSP Building West 614, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
ACS Applied Materials & Interfaces
|August 18, 2010
Summary
Researchers developed TiO2-PDMS composite films with rewritable wettability. These films switch between hydrophobic and superhydrophilic states upon UV irradiation, offering a reusable patterning method without chemicals.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Developing stimuli-responsive materials for advanced applications.
- Controlling surface wettability is crucial for various technologies.
- Photoresponsive materials offer dynamic surface property control.
Purpose of the Study:
- To create composite films with tunable wettability using TiO2 and PDMS.
- To investigate the photoinduced superhydrophilicity and reversible hydrophobic recovery of the composite films.
- To demonstrate the fabrication of rewritable wettability patterns on the films.
Main Methods:
- Sol-gel synthesis of TiO2-PDMS composite films.
- UV irradiation curing and hot water treatment for TiO2 crystallization.
- Contact angle measurements to assess surface wettability.
- Patterning via UV irradiation and thermal erasure.
Main Results:
- Anatase TiO2 crystallization induced photoinduced superhydrophilicity under UV light.
- The TiO2-PDMS films exhibited reversible hydrophobic recovery after UV removal.
- Successfully created and erased hydrophobic-superhydrophilic patterns, demonstrating rewritable wettability.
Conclusions:
- TiO2-PDMS composite films possess controllable and reversible wettability.
- The developed material enables the creation of rewritable surface patterns without organic chemicals.
- This technology holds potential for applications requiring dynamic surface control.
