Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Regular Section - Papers - Organic Molecular Electronics |
Quantitative Characterization of Surface Amino Groups of Plasma-Polymerized Films Prepared from Nitrogen-Containing Monomers for Bioelectronic Applications
1 The author is with the Graduate School of Electrical Engineering and Department of Electronic Engineering, Shibaura Institute of Technology, Tokyo, 135-8548 Japan. E-mail: muguruma{at}sic.shibaura-it.ac.jp
The surface amino groups of plasma-polymerized films prepared from various nitrogen-containing monomers were quantitatively characterized for bioelectronic and biomedical applications. X-ray photoelectron spectroscopy (XPS) measurements were conducted on two kinds of surfaces: pristine surfaces of plasma-polymerized film prepared using various nitrogen-containing monomers, and theirs surfaces whose amino groups had been derivatized by a primary-amine-selective reagent carrying an XPS label. The XPS data showed that the maximum surface density of amino groups for this film was 8.4 x 1013 cm–2. Amino groups constituted 14–64% of all surface nitrogen atoms (NH/N), depending on the monomer used.
Key Words: plasma-polymerized film, X-ray photoelectron spectroscopy, amino group, surface modification, ethylenediamine, allylamine, acetonitrile
Manuscript received September 13, 2007. Manuscript revised January 8, 2008.
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