Title :
Bio-inspired 3D self-patterning of functional coatings for PDMS microfluidics
Author :
Wu, Tianzhun ; Suzuki, Hiroaki ; Yomo, Tetsuya
Author_Institution :
Sch. of Phys. & Eng., Sun Yat-sen Univ., Guangzhou, China
Abstract :
We report a novel, simple and effective 3D self-patterning method for functional coatings on poly(dimethylsiloxane) (PDMS) microfluidics before bonding, inspired by the wettability-based fast evaporation of water film on superhydrophilic plant leaves. Induced by evaporation, liquid-phase functional coatings are selectively deposited on rough PDMS surfaces, enabling the conventional PDMS-glass bonding. Several control factors are investigated to improve the coating quality including roughness, coverage, uniformity and clogging issues. Teflon-like CYTOP coatings have been demonstrated on PDMS channels with good coverage, uniformity and bonding strength, and significantly reduced the swelling, deformation and collapse of PDMS channels in toluene.
Keywords :
biosensors; bonding processes; microfluidics; polymer films; wetting; PDMS channels; PDMS microfluidics; bio-inspired 3D self-patterning; functional coatings; superhydrophilic plant leaves; wettability-based fast evaporation; Bonding; Coatings; Etching; Microfluidics; Rough surfaces; Surface roughness; CYTOP; PDMS; bio-inspired; functional coating; self-patterning; swelling; wettability;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-0157-3
DOI :
10.1109/TRANSDUCERS.2011.5969541
