Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 124, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2021.106961
Keywords
Protein adsorption; Surface coverage; Copper underpotential deposition
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Funding
- [690898/H2020-MSCA-RISE-2015]
- [BIONANO_GINOP2.3.2-15-2016-00017]
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In this study, the use of copper underpotential deposition (UPD) was demonstrated to measure the electrochemically active surface area of a protein-modified gold electrode. The adsorption behavior of beta-casein was found to be influenced by the surface roughness, microstructure of the gold electrode, and the concentration of the protein solution.
We demonstrate the use of copper underpotential deposition (UPD) for measurement of the electrochemically active surface area of a protein-modified gold electrode. The kinetics of adsorption and the subsequent structural rearrangement of beta-casein, as a model protein, on the surface of a gold electrode have been followed over time. The protein-free surface area was determined by measuring the charge derived from UPD copper deposition on the non-blocked surface area at different stages of adsorption. The behaviour of beta-casein adsorption as a function of surface roughness and the microstructure of the gold electrode, as well as the concentration of the protein solution, are studied using this method.
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