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Finite Element Modelling of a Cellular Electric Microenvironment
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The pH dependent surface charging and points of zero charge. X. Update
1Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
Advances in Colloid and Interface Science
|August 13, 2023
Summary
This review compiles accurate surface charge data, focusing on points of zero charge (PZC) and isoelectric points (IEP) determined using reliable methods with inert electrolytes. It clarifies terminology and presents new and older data for materials science.
Area of Science:
- Surface Chemistry
- Materials Science
- Electrochemistry
Background:
- Surface properties like points of zero charge (PZC) and isoelectric points (IEP) are crucial but often ambiguously defined and measured.
- Existing literature shows inconsistent terminology and methodology for determining these surface characteristics.
Purpose of the Study:
- To critically review and compile accurate PZC and IEP data for various materials.
- To standardize the definition and measurement of PZC and IEP, focusing on inert electrolyte conditions.
- To present recent findings alongside previously overlooked data for comprehensive comparison.
Main Methods:
- Focusing on PZC determination via potentiometric titration curves at multiple ionic strengths.
- Including IEP data for diverse materials.
- Excluding results from less rigorous methods like mass titration or pH-drift.
Main Results:
- Compilation of PZC/IEP data obtained under specific conditions (inert electrolytes, controlled temperature).
- Inclusion of data for metal oxides and other materials.
- Cross-referencing with previous reviews for historical data comparison.
Conclusions:
- Clarifies the precise definitions and reliable measurement techniques for PZC and IEP.
- Provides a valuable, updated resource for researchers in surface science and materials.
- Highlights the importance of consistent methodology for accurate surface characterization.
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