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Surface Coating of Bonded PDMS Microchannels by Atmospheric Pressure Microplasma
Author(s) -
Bashir Muhammad,
Bashir Shazia,
Rees Julia M.,
Zimmerman William. B.
Publication year - 2014
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201300123
Subject(s) - microplasma , hexamethyldisiloxane , materials science , polydimethylsiloxane , microchannel , plasma polymerization , coating , analytical chemistry (journal) , x ray photoelectron spectroscopy , plasma enhanced chemical vapor deposition , nanofluidics , microfluidics , atmospheric pressure , contact angle , surface modification , chemical engineering , polymer , polymerization , nanotechnology , thin film , composite material , plasma , chemistry , chromatography , physics , oceanography , quantum mechanics , geology , engineering
The surface coating of sealed microchannels is useful for a variety of applications in microfluidics and lab‐on‐a‐chip devices. This paper demonstrates a novel coating technique for a bonded polydimethylsiloxane (PDMS) microchannel using atmospheric pressure microplasma. Plasma was generated by using two types of electrode arrangements: (i) needle–aluminum foil with dielectric barrier (DB) and (ii) needle–needle configuration without DB. The microplasma configuration with the DB was selected for deposition in this study. The monomer ethylenediamine was used as organic precursor for plasma polymerization. Oil‐in‐water microemulsions were formed in a T‐shaped microchannel in order to test the stability and durability of the plasma polymerized films. The coatings were characterized using Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, atomic force microscopy, and contact angle measurements.