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Micro-Sized pH Sensors Based on Scanning Electrochemical Probe Microscopy.

Muhanad Al-Jeda¹, Emmanuel Mena-Morcillo¹, Aicheng Chen¹

¹Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada.

|December 23, 2022

Summary

Micro/nano pH sensors offer high spatial resolution for monitoring surface processes. Scanning electrochemical microscopy (SECM) enhances their application in diverse scientific fields.

Keywords:

localized pH microelectrode probe microsensor nanosensor potentiometric sensor scanning electrochemical microscopy voltammetric sensor

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Area of Science:

Electrochemistry
Materials Science
Analytical Chemistry

Background:

Understanding surface processes requires monitoring pH at the micro/nano scale.
Micro/nano-sized pH sensors are crucial for detecting local pH changes at interfaces.
Scanning electrochemical microscopy (SECM) enables high spatial resolution measurements.

Purpose of the Study:

To review the design, fabrication, and applications of micro/nano-sized pH sensors with SECM.
To examine probe selection for biological, corrosion, energy, and environmental studies.
To summarize and compare different types of pH-sensitive probes.

Main Methods:

Review of state-of-the-art micro/nano-pH sensor design and fabrication.
Integration of pH sensors with Scanning Electrochemical Microscopy (SECM).
Comparative analysis of various pH-sensitive probe types.

Main Results:

Detailed examination of micro/nano-pH sensor applications in diverse fields.
Considerations for probe selection based on specific research areas.
Summary and comparison of existing pH sensing probe technologies.

Conclusions:

Micro/nano-pH sensors coupled with SECM are powerful tools for surface process analysis.
The review provides insights into probe selection and future trends.
Emerging applications highlight the growing importance of nanoscale pH monitoring.