Title: Formation of Viscoelastic Protein Droplets on a Chemically Functionalized Surface
Authors: BELEGRINOU S.MANNELLI ILARIASIRGHI LUCELBRETAGNOL FREDERICVALSESIA ANDREARAUSCHER HUBERTROSSI FRANCOIS
Citation: JOURNAL OF PHYSICAL CHEMISTRY B vol. 111 no. 30 p. 8713-8716
Publisher: AMER CHEMICAL SOC
Publication Year: 2007
JRC N°: JRC42188
ISSN: 1520-6106
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC42188
DOI: 10.1021/jp073297x
Type: Articles in Journals
Abstract: Droplet formation during adsorption of the protein lactoferrin from an aqueous solution on a surface functionalized by plasma deposited poly(acrylic acid) is studied using quartz crystal microbalance and atomic force microscopy. The formation of protein droplets is particularly favored at pH values close to the isoelectric point of lactoferrin, where the molecules carry little excess charge and intermolecular attraction exceeds the molecule-surface interaction. By combining topographic data with information on the system dynamics it is possible to describe the viscoelastic properties of the adsorbate within a quantitative model for non-homogeneous layers.
JRC Institute:Institute for Health and Consumer Protection

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