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

fYear

2011

fDate

5-9 June 2011

Firstpage

2311

Lastpage

2314

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International

Conference_Location

Beijing

ISSN

Pending

Print_ISBN

978-1-4577-0157-3

Type

conf

DOI

10.1109/TRANSDUCERS.2011.5969541

Filename

5969541