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Protein Interactions With Oligo(ethylene Glycol) (OEG) Self-assembled Monolayers: OEG Stability, Surface Packing Density And Protein Adsorption

L. Li, S. Chen, S. Jiang
Published 2007 · Materials Science, Medicine

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We present a study of protein adsorption on oligo(ethylene glycol) (OEG) self-assembled monolayers (SAMs) at a range of OEG surface densities. OEG SAMs were formed in mixed ethanol and water solutions at different assembly temperatures to adjust the packing density of EG4-SAMs. These SAMs were characterized using X-ray photoelectron spectroscopy (XPS). Fibrinogen adsorption on these surfaces was measured by a surface plasmon resonance (SPR) sensor at different temperatures. This work is aimed at addressing three important issues for protein–OEG interactions, i.e., (i) OEG stability, (ii) the correlation between OEG surface densities and surface non-fouling properties, and (iii) protein adsorption on OEG surfaces at different temperatures.
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