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Tunable Adsorption and Film Formation of Mussel Adhesive Protein by Potential Control
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science. Tsinghua University, China.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
2017 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 33, no 35, 8749-8756 p.Article in journal (Refereed) Published
Abstract [en]

Mussel adhesive proteins are of great interest in many applications because of their outstanding adhesive property and film forming ability. Understanding and controlling the film formation and its performance is crucial for the effective use of such proteins. In this study, we focus on the potential controlled film formation and compaction of one mussel adhesive protein, Mefp-1. The adsorption and film-forming behavior of Mefp-1 on a platinum (Pt) substrate under applied potentials were investigated by cyclic voltammetry, potential-controlled electro-chemical impedance spectroscopy (EIS), and quartz crystal microbalance with dissipation monitoring (QCM-D). Moreover, microfriction measurements were performed to evaluate the mechanical properties of the Mefp-1 films formed at selected potentials. The results led to the conclusion that Mefp-1 adsorbs on the Pt substrate through both electrostatic and nonelectrostatic interactions and shows an effective blocking effect for the electroactive sites on the substrate. The properties of the adsorbed Mefp-1 film vary with the applied potential, and the compactness of the adsorbed Mefp-1 film can be reversibly tuned by the applied potential.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 33, no 35, 8749-8756 p.
National Category
Other Chemistry Topics
Identifiers
URN: urn:nbn:se:kth:diva-215369DOI: 10.1021/acs.langmuir.6b04125ISI: 000410015000020PubMedID: 28071917Scopus ID: 2-s2.0-85028941962OAI: oai:DiVA.org:kth-215369DiVA: diva2:1148140
Funder
VINNOVA, 2013-02073
Note

QC 20171010

Available from: 2017-10-10 Created: 2017-10-10 Last updated: 2017-10-10Bibliographically approved

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