Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 81, Issue -, Pages 24-28Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.05.019
Keywords
Hydrogel layers; Microelectrode modification; Diffusional and migrational transport
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Funding
- National Science Centre of Poland [2014/15/ST5/01980, 2015/19/B/ST5/03530]
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Transport of a redox probe to the surface of an electrode modified with a pH-sensitive polymer network was investigated. After becoming appropriately charged the hydrogel film could act as an electrostatic barrier for negatively charged probes. In the example studied, the charge was obtained by dissociating the carboxylic groups in the polymer network. The percentage of dissociation was determined by the pH of the solution. In parallel, the contribution of migration also played an important role in the transport of the probes. Both regularsized electrodes and microelectrodes were used in the electrochemical experiments.
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