ArticleThe journal of physical chemistry. B2022
Zwitterions Layer at but Do Not Screen Electrified Interfaces.
Article in The journal of physical chemistry. B, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 0 citations in OpenAlex.
- The influence of proline on surface interactions in aqueous solutions.Biophysical journal · 2025Article
- Influence of Surface-Active Molecules in Solution on Charge Transfer Due to a Water-Air Contact Line Moving over a Hydrophobic Surface.Langmuir : the ACS journal of surfaces and colloids · 2025Article
- Chemical control of colloidal self-assembly driven by the electrosolvation force.Nature communications · 2025Article
- Charge Transfer Quenching and Maximum of a Liquid-Air Contact Line Moving over a Hydrophobic Surface.Langmuir : the ACS journal of surfaces and colloids · 2024Article
- Zwitterions fine-tune interactions in electrolyte solutions.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Ion Concentration Influences the Charge Transfer Due to a Water-Air Contact Line Moving over a Hydrophobic Surface: Charge Measurements and Theoretical Models.Langmuir : the ACS journal of surfaces and colloids · 2023Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The role of ionic electrostatics in colloidal processes is well-understood in natural and applied contexts; however, the electrostatic contribution of zwitterions, known to be present in copious amounts in extremophiles, has not been extensively explored. In response, we studied the effects of glycine as a surrogate zwitterion, ion, and osmolyte on the electrostatic forces between negatively charged mica-mica and silica-silica interfaces. Our results reveal that while zwitterions layer at electrified interfaces and contribute to solutions' osmolality, they do not affect at all the surface potentials, the electrostatic surface forces (magnitude and range), and solutions' ionic conductivity across 0.3-30 mM glycine concentration. We infer that the zwitterionic structure imposes an inseparability among positive and negative charges and that this inseparability prevents the buildup of a counter-charge at interfaces. These elemental experimental results pinpoint how zwitterions enable extremophiles to cope with the osmotic stress without affecting finely tuned electrostatic force balance.
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