Abstract
We developed a novel method of fabricating polymer film on a substrate at atmospheric pressure using atmospheric-pressure plasma polymerization (APPP) with a laboratory-made torch-type APPP apparatus. We used allylamine and acrylic acid as model monomers to optimize the polymerization conditions and evaluate the fabricated films. The APPP films were characterized by Fourier transform infrared (FT-IR) spectroscopy, contact angle measurement, atomic force microscopy (AFM), ellipsometry, X-ray photoelectron spectroscopy (XPS), deposition rate determination, and persistence measurement. Results showed that the properties of the APPP allylamine and acrylic acid films can be controlled by adjusting the polymerization parameter of ultrahighfrequency power.
Highlights
Sensors and Materials, Vol 22, No 7 (2010)A plasma-polymerized thin film is a useful interface for immobilizing receptor biomolecules
We report on the successful formation of an atmospheric-pressure plasma polymerization (APPP)-generated polymer film from allylamine and acrylic acid monomers at low temperatures using a ultrahigh frequency (UHF) power supply and torch-type APPP equipment
Allylamine and acrylic acid monomers were of guaranteed grade, purchased from Wako Pure Chemical Industries Ltd. (Tokyo, Japan) and used without further purification. 10 mM phosphate-buffered saline (PBS) buffer was prepared at pH 7.40
Summary
Sensors and Materials, Vol 22, No 7 (2010)A plasma-polymerized thin film is a useful interface for immobilizing receptor biomolecules. Plasma polymers can be created by inducing the polymerization of monomer gas in a low-temperature thermal nonequilibrium state by high-frequency electric discharge.[11] Polymers created by this method adhere firmly to the substrate because of their elevated bridge structure and are physically and chemically stable. Their structure and function can be controlled by controlling the polymerization conditions.[12,13,14,15,16] their chemical composition, physical structure, and size are difficult to control, and they are difficult to form into films. Ito and Terashima have developed an ultrahigh frequency (UHF) source using thermoelectron support thermoelectron-enhanced micrometer-scale plasma (TEMP) to sustain stable micrometer-scale plasma generation.[18,19] The micrometerscale plasma space is a very small, very high energy place, where plasma forms and radicals are efficiently generated.[20,21] If the APPP reaction in this space can be made regioselective, a dry process of macromolecule polymerization could be attained on demand.[22,23]
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