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Adsorption behaviour of sulfur containing polymers to gold surfaces using QCM-D

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Slavin, Stacy, Soeriyadi, Alexander H., Voorhaar, Lenny, Whittaker, Michael R., Becer, C. Remzi, Boyer, Cyrille, Davis, Thomas P. and Haddleton, David M. (2012) Adsorption behaviour of sulfur containing polymers to gold surfaces using QCM-D. Soft Matter, Vol.8 (No.1). pp. 118-128. doi:10.1039/c1sm06410j

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Official URL: http://dx.doi.org/10.1039/C1SM06410J

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Abstract

We investigate the influences that functional group, polymer molecular weight and polymer molecular architecture have on the adsorption behaviour of some sulfur containing oligo(ethylene glycol) polymers to gold. QCM-D and XPS was used in this investigation revealing that disulfide functional groups bind with more mass deposited than dithio, trithio or thiols. This was observed with small di(ethylene glycol) polymers and with higher mass polymers. The effect of the sulfo-groups was not as apparent with higher mass polymers. Longer PEG pendent chains resulted in lower binding overall on the gold surface in comparison to shorter DEG chains caused by shielding of sulfur by the longer pendent chains. Thiols undergo two steps during the adsorption process while all other sulfur species adsorb in one step. XPS revealed the dissociation of disulfide bonds when binding to gold. These findings are important when forming stable polymer films on gold efficiently, with uses in applications from bio-fouling to polymer-lipid bilayers.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Sulfur -- Absorption and adsorption, Polymers -- Absorption and adsorption, Gold, Quartz crystal microbalances
Journal or Publication Title: Soft Matter
Publisher: Royal Society of Chemistry
ISSN: 1744-683X
Official Date: 2012
Dates:
DateEvent
2012Published
Volume: Vol.8
Number: No.1
Page Range: pp. 118-128
DOI: 10.1039/c1sm06410j
Status: Peer Reviewed
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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