Fabrication of a pH microsensor for local pH measurement during chromium electrodeposition from a trivalent chromium-based electrolyte

Dasque, Ariane; Gressier, Marie; Menu, Marie-Joëlle; Taberna, Pierre‐Louis

doi:10.1016/j.elecom.2022.107213

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Alternating Current-scanning Electrochemical Microscopy1

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2022

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“…Furthermore, if the substrate is connected to the system and held at a constant potential, the equivalent electrical circuit becomes challenging to construct [80]. Hence, the main strategy followed in literature is to approach pH sensors over an insulating region of the substrate [81][82][83][84].…”

Section: Alternating Current-scanning Electrochemical Microscopymentioning

confidence: 99%

Micro-Sized pH Sensors Based on Scanning Electrochemical Probe Microscopy

2022

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Monitoring pH changes at the micro/nano scale is essential to gain a fundamental understanding of surface processes. Detection of local pH changes at the electrode/electrolyte interface can be achieved through the use of micro-/nano-sized pH sensors. When combined with scanning electrochemical microscopy (SECM), these sensors can provide measurements with high spatial resolution. This article reviews the state-of-the-art design and fabrication of micro-/nano-sized pH sensors, as well as their applications based on SECM. Considerations for selecting sensing probes for use in biological studies, corrosion science, in energy applications, and for environmental research are examined. Different types of pH sensitive probes are summarized and compared. Finally, future trends and emerging applications of micro-/nano-sized pH sensors are discussed.

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