Journal
ANALYTICAL CHEMISTRY
Volume 94, Issue 42, Pages 14603-14610Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.2c02459
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Funding
- NRC's METALTec industrial research group
- Centre quebecois de recherche et de developpement de l'aluminium (CQRDA)
- Canadian Office for Energy Research and Development (OERD)
- METALTec industrial research group
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The applied approach potential in single-channel scanning electrochemical cell microscopy affects the interaction between the probe and substrate, as well as subsequent microscale electrochemical measurements.
In single-channel scanning electrochemical cell microscopy, the applied potential during the approach of a micropipette to the substrate generates a transient current upon droplet contact with the substrate. Once the transient current exceeds a set threshold, the micropipette is automatically halted. Currently, the effect of the approach potential on the subsequent electrochemical measurements, such as the open-circuit potential and potentiodynamic polarization, is considered to be inconsequential. Herein, we demonstrate that the applied approach potential does impact the extent of probe-to-substrate interaction and subsequent microscale electro-chemical measurements on aluminum alloy AA7075-T73.
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