Viscoelastic properties of electrochemically deposited protein/metal complexes

Langmuir : the ACS Journal of Surfaces and Colloids
Elizabeth J MartinKenneth R Shull

Abstract

The interfacial gelation of proteins at metallic surfaces was investigated with an electrochemical quartz crystal microbalance (QCM). When Cr electrodes were corroded in proteinaceous solutions, it was found that gels will form at the Cr surfaces if molybdate ions are also present in the solution. Gelation is reversible and can also be controlled with the electrochemical potential at the electrode. Further, a method was developed to characterize the viscoelastic properties of thin films in liquid media using the QCM as a high-frequency rheometer. By measuring the frequency and dissipation at multiple harmonics of the resonance frequency, the viscoelastic phase angle, density-modulus product, and areal mass of a film can be determined. The method was applied to characterize the protein films, demonstrating that they have a phase angle near 55° and a density-modulus product of ≈10(7) Pa·g/cm(3). Data imply that the gels are composed of a weakly cross-linked proteinaceous network with properties similar to albumin solutions with concentrations in the range of ≈40 wt %.

References

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Oct 18, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·David A Brass, Kenneth R Shull
Jul 31, 2008·Physical Chemistry Chemical Physics : PCCP·Diethelm Johannsmann
Jan 13, 2009·Journal of Colloid and Interface Science·Amit RudrakeJ Hugh Horton
Jul 20, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Garret C DeNolfKenneth R Shull
Aug 4, 2011·Journal of Molecular Recognition : JMR·Bernd Becker, Matthew A Cooper
Apr 5, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Elizabeth J MartinKenneth R Shull
Feb 25, 2014·Journal of Colloid and Interface Science·Junlong SongOrlando J Rojas
Apr 15, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Alberto TiraferriMichal Borkovec
Jun 28, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Lu SunBjörn Akerman
Jul 16, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Garret C DeNolfKenneth R Shull

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Citations

Jul 16, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Elizabeth J MartinKenneth R Shull
Feb 2, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Kazi SadmanKenneth R Shull
Nov 4, 2020·Materials·Oksana KlokStefano Mischler
Nov 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Mengxue ZhangBryan D Vogt
Aug 31, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Lirong ShiZhan Chen

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