Surface functionalization by RF plasma deposition of ethylene diamine, acrylonitrile, and acetonitrile

Abstract

Surface rich in covalently-bonded amine groups have wide end use applications in biomaterials. This article describes functionalization of stainless steel (SS) surface with reactive chemical groups using RF-cold-plasma polymerization of ethylene diamine (ED), acrylonitrile (AN), and acetonitrile (AcN). The effect of RF plasma power and frequency (40 kHz and 13.56 MHz) on surface chemistry was investigated by electron spectroscopy for chemical analysis (ESCA) and FTIR. It was demonstrated that all the plasma-deposited films consist of secondary and tertiary amines, imines, and amides with a small concentration of nitrile groups present in AN plasma. Significant changes in ED, and AN plasma-induced molecular fragmentation occur as the plasma conditions are varied. However, AcN plasma polymer chemistry is observed to be independent of RF frequency. Films deposited at 13.56 MHz RF power in continuous mode have higher concentrations of CÀ ÀN linkages, with maximum in ED plasma-polymerized films.

Interaction of (3-Aminopropyl)triethoxysilane with Pulsed Ar–O2 Afterglow: Application to Nanoparticles Synthesis

“…Plasma deposition processes are well known to produce improved surface stability, controlled chemical functionality and topography [6][7][8][9][10]. They can be considered as the best industrial technique platform to realize, on each type of inorganic surfaces -and especially on metallic surfaces -an inorganic/organic interlayer for the covalent bonding of biomolecules [11][12][13].…”

Optimization of Plasma Polymerized Ethylenediamine Film Chemistry on Quartz Particles

“…Amine terminated surfaces can be used for a wide range of applications, especially for biomedical purposes . Amine terminated surfaces have shown to improve biocompatibility, wettability, cell adhesion, and can also be used for the immobilization of a number of biomolecules . Amine terminated surface are positively charged in aqueous environments and can therefore be used to interact with negatively charged molecules via electrostatic attraction .…”

Combined Continuous Wave and Pulsed Plasma Modes: For More Stable Interfaces with Higher Functionality on Metal and Semiconductor Surfaces

“…While polymer surfaces can be easily equipped with amino groups even just by ammonia plasma treatment,5, 6 titanium surfaces require an interface layer based on a functionalized siloxane or hydrocarbon polymer 7. Some work, aimed at improved biocompatibility, using plasma polymerization of allylamine8–10 and of hexamethyldisiloxane11 on titanium, and of other monomers on stainless steel12 has been reported. However, means of producing more stable adhesion layers with higher levels of chemical functionality and biocompatibility on metal surfaces are required.…”