Cited by 79Electrostatics and Colloid InteractionsChemical and Physical StudiesForce Microscopy Techniques and Applications

Ion-Specific and pH-Dependent Hydration of Mica–Electrolyte Interfaces

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van Lin, Simone R., Grotz, Kara K., Siretanu, Igor, Schwierz, Nadine, Mugele, Frieder·2019·Langmuir

Abstract

Hydration forces play a crucial role in a wide range of phenomena in physics, chemistry, and biology. Here, we study the hydration of mica surfaces in contact with various alkali chloride solutions over a wide range of concentrations and pH values. Using atomic force microscopy and molecular dynamics simulations, we demonstrate that hydration forces consist of a superposition of a monotonically decaying and an oscillatory part, each with a unique dependence on the specific type of cation. The monotonic hydration force gradually decreases in strength with decreasing bulk hydration energy, leading to a transition from an overall repulsive (Li+, Na+) to an attractive (Rb+, Cs+) force. The oscillatory part, in contrast, displays a binary character, being hardly affected by the presence of strongly hydrated cations (Li+, Na+), but it becomes completely suppressed in the presence of weakly hydrated cations (Rb+, Cs+), in agreement with a less pronounced water structure in simulations. For both aspects, K+ plays an intermediate role, and decreasing pH follows the trend of increasing Rb+ and Cs+ concentrations.

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Crossref · 10.1021/acs.langmuir.9b00520

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  • The correlation between the hydration strength of an anion and the decay length of the hydration force is similar to that involving kosmotropic cations.

    “This correlation between hydration strength of anion and decay length of hydration force is similar to that involving kosmotropic cations [58,73].”

    From Effect of Hofmeister Anions on Interfacial Properties of Mica Surface in Concentrated Aqueous Solution (2020) · cites this paper as [73]

    In Results and Discussion, “Dependence on Specific Ions” (page unavailable), the paper reports that hydration-force decay lengths show no appreciable dependence on cation type. The “pH Dependence” section likewise says decay length is largely independent of added ions, while hydration-force strength varies with them. It does not establish the claimed analogous relationship for anions. (LLM, conf=0.88)

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Research works printed but not linked: 1

  1. Derjaguin B.; Landau L. The theory of stability of highly charged lyophobic sols and coalescence of highly charged particles in electrolyte solutions. Acta Physicochim. URSS 1941, 14, 58.

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Authors
van Lin, S. R., Grotz, K. K., Siretanu, I., Schwierz, N., & Mugele, F.
Affiliations
  • University of Twente , , P.O. Box 217, ,
  • Max Planck Institute of Biophysics (DE)
  • University of Twente (NL)
Corresponding author
Mugele, Frieder
Venue
Langmuir
Published
2019-04-11
Volume
35
Issue
17
Pages
5737-5745
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
OpenAlex
W2939361347
Cited by
79
References
74
Citations by year
2026: 13 · 2025: 8 · 2024: 7 · 2023: 16 · 2022: 13 · 2021: 8 · 2020: 11 · 2019: 3
FWCI
5.78
Type
journal article
Language
en
Open access
Locations
  • Langmuir (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • University of Twente Research Information (publishedVersion, cc-by-nc-nd)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
  • OPUS (Augsburg University) (submittedVersion, cc-by-nc-nd)
  • University of Twente Research Information (submittedVersion, cc-by-nc-nd)
Funders
  • Deutsche Forschungsgemeinschaft (NA)
  • Stichting voor de Technische Wetenschappen (i40)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Electrostatics and Colloid Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Chemical and Physical Studies
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Force Microscopy Techniques and Applications
Keywords
hydration forces, mica surface, pH dependence, hydration energy, cation hydration, alkali metal cations, water structure

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