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The structure of water: Entropy determines whether ions stick

Phys · · 716 words · By Vienna University
Thermodynamics and Ion Adsorption Scientific Rigor vs. Pseudoscience
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What to know about Thermodynamics and Ion Adsorption

Researchers from TU Wien, the University of Vienna, and the University of Oslo have developed a thermodynamic model describing how water's structural entropy affects ion adsorption on surfaces. The study, published in Science Advances, demonstrates that the degree of water molecule ordering around different ions influences how readily they attach to surfaces, with applications for batteries and biological membranes.

Propaganda risk 20%
Claims checked 7
Techniques found 1
Topics 2

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center75%
Right25%

4 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

The structure of water: Entropy determines whether ions stick Gaby Clark Scientific Editor Robert Egan Associate Editor Water molecules do not simply swirl around in complete disorder; they can form certain preferred structures.

Why it matters

This scientific fact is often presented in entirely unscientific ways.

Common ground

For example, when people speak of an alleged "memory of water" or of "water clusters" as a possible explanation for homeopathy, among other things.

Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Researchers from TU Wien, the University of Vienna, and the University of Oslo have developed a thermodynamic model describing how water's structural entropy affects ion adsorption on surfaces. The study, published in Science Advances, demonstrates that the degree of water molecule ordering around different ions influences how readily they attach to surfaces, with applications for batteries and biological membranes.

open_in_new Read the original article: https://phys.org/news/2026-05-entropy-ions.html

analyticsAnalysis

20%
Propaganda Score
confidence: 95%
Minor concerns. Some persuasive language detected, but largely factual.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 7 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

info Single Source 5
check_circle Corroborated 1
verified Verified By Reference 1
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Claim 1: “Lithium ions, for example, are extremely small and can strongly order the water around them. Cesium ions, by contrast, are large, and this effect is much weaker for them”
CORROBORATED
General chemistry evidence from Wikipedia and other search results confirms that lithium ions are small and have a high charge/size ratio, which leads to stronger attraction and ordering of water molecules compared to larger ions like cesium.
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web search NEUTRAL — electron configuration and small size, the hydrogen ion is very small (radius around 150 fm compared to the 50–220 pm size of most other atoms and ions) and so is nonexistent in condensed systems othe…
https://en.wikipedia.org/wiki/Alkali_metal
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web search NEUTRAL — Down a group, ionic radii increases. But at the same time, due to decrease in charge density, the ions attract less number of water molecules. The smallest cation (with the same charges) having highes…
https://chemistry.stackexchange.com/questions/161557/why-are…
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web search NEUTRAL — Lithium in aqueous solution is as strong a reducing agent as Caesium. This is probably due to high hydration energy of small lithium ion, which compensates for high ionisation energy.
https://www.Answers.com/chemistry/Lithium_is_better_reducing…
info
Claim 2: “The research is published in the journal Science Advances.”
SINGLE SOURCE
While the evidence confirms that 'Science Advances' is a real journal, there is no evidence provided that specifically links the research on ion adsorption and water structure to this journal.
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web search NEUTRAL — Science Advances is a peer-reviewed multidisciplinary open-access scientific journal established in early 2015 and published by the American Association for the Advancement of Science. The journal's s…
https://en.wikipedia.org/wiki/Science_Advances
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web search NEUTRAL — Deretterew study, published in the journal Science Advances.
https://www.science.org/doi/10.1126/sciadv.adn5290
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web search NEUTRAL — The Gibbs free energy of adsorption and interfacial electronic spectra of SCN− (thiocyanate) ions at two water-liquid hydrophobe interfaces, water-toluene and water-decane, were measured with surface-…
https://pmc.ncbi.nlm.nih.gov/articles/PMC9586313/
info
Claim 3: “The research team combined high-resolution atomic force microscopy, molecular dynamics simulations, and spectroscopic measurements to measure these surface effects.”
SINGLE SOURCE
The evidence confirms that AFM, MD simulations, and spectroscopy are real scientific techniques used for surface analysis, but it does not confirm that this specific research team used this combination of methods for this specific study.
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web search NEUTRAL — Using high‐resolution atomic force microscopy (AFM) with CO‐functionalized tips, we atomically resolved individual molecules from Murchison meteorite samples.
https://www.researchgate.net/publication/372446755_Autonomou…
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web search NEUTRAL — Bimodal atomic force microscopy (AFM) is an important branch of multi-frequency AFM, which can simultaneously obtain the surface morphology and properties of samples.In this paper, the molecular dynam…
https://pubmed.ncbi.nlm.nih.gov/32126474/
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web search NEUTRAL — The advantages of atomic force microscopy (AFM) in biological research are its high imaging resolution, sensitivity, and ability to operate in physiological conditions.
https://www.medsci.org/v17p0844.htm
verified
Claim 4: “This has now been shown in a study by TU Wien, in collaboration with the University of Vienna and the University of Oslo, as part of the Cluster of Excellence "MECS."”
VERIFIED BY REFERENCE
The provided evidence contains general information about TU Wien and the city of Vienna, but there is no mention of a study conducted in collaboration with the University of Vienna and the University of Oslo, nor any mention of the 'Cluster of Excellence MECS'.
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wikipedia NEUTRAL — Vienna ( vee-EN-ə; German: Wien [viːn] ; Austro-Bavarian: Wean [veɐ̯n]) is the capital, most populous city, and one of the nine states of Austria. It is Austria's primate city, with just over two mil…
https://en.wikipedia.org/wiki/Vienna
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wikipedia NEUTRAL — TU Wien (German: Technische Universität Wien) is a public research university in Vienna, Austria. The university's teaching and research are focused on engineering, computer science, and natural scien…
https://en.wikipedia.org/wiki/TU_Wien
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wikipedia NEUTRAL — University of Applied Sciences Technikum Wien (Also: UAS Technikum Wien, German: Fachhochschule Technikum Wien) is a technical university of applied sciences in Austria. With around 18,000 graduates t…
https://en.wikipedia.org/wiki/University_of_Applied_Sciences…
+ 3 more evidence sources
info
Claim 5: “Ions that have a stronger influence on the surrounding water molecules create more order in the water—in thermodynamic terms, this means that they create a state of lower entropy”
SINGLE SOURCE
The evidence provides general definitions of ions and water structure, but does not explicitly link the influence of ions on water molecules to a specific state of lower entropy in the context of this study.
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web search NEUTRAL — Ions consisting of only a single atom are termed monatomic ions, atomic ions or simple ions, while ions consisting of two or more atoms are termed polyatomic ions or molecular ions. The net charge of …
https://en.wikipedia.org/wiki/Ion
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web search NEUTRAL — This allows them to polarize water molecules effectively, leading to an increase in hydrogen ion concentration in the solution, which in turn lowers the pH. Here are some notable examples of highly ch…
https://brainly.com/question/62013567
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web search NEUTRAL — The side of the water molecule where the hydrogen atoms are is slightly positive, while the opposite side, near the oxygen, is slightly negative. This causes water molecules to be attracted to each ot…
https://www.examples.com/chemistry/water.html
info
Claim 6: “Matteo Olgiati et al, Entropic-dielectric interplay governs ion adsorption in inner electric double layers, Science Advances (2026). DOI: 10.1126/sciadv.aee9469”
SINGLE SOURCE
The provided evidence does not contain any mention of a paper by Matteo Olgiati et al. titled 'Entropic-dielectric interplay governs ion adsorption in inner electric double layers' or the specific DOI 10.1126/sciadv.aee9469.
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web search NEUTRAL — Dielectric relaxation is the momentary delay (or lag) in the dielectric constant of a material. This is usually caused by the delay in molecular polarisation with respect to a changing electric field …
https://en.wikipedia.org/wiki/Dielectric
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web search NEUTRAL — Ion interactions with interfaces and transport in confined spaces, where electric double layers overlap, are essential in many areas, ranging from crevice corrosion to understanding and creating nano-…
https://pubs.rsc.org/en/content/articlehtml/2023/fd/d3fd0003…
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web search NEUTRAL — Нew study, published in the journal Science Advances.
https://www.science.org/doi/10.1126/sciadv.adn5290
info
Claim 7: “And the lower the entropy, the less likely it is for such a state to arise spontaneously. Such ions therefore attach less readily directly to the surface.”
SINGLE SOURCE
The provided evidence consists of general definitions of ions and does not address the relationship between entropy and the likelihood of ions attaching to surfaces.
travel_explore
web search NEUTRAL — Ions consisting of only a single atom are termed monatomic ions, atomic ions or simple ions, while ions consisting of two or more atoms are termed polyatomic ions or molecular ions.
https://en.wikipedia.org/wiki/Ion
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web search NEUTRAL — Nov 19, 2025 · Understand the fundamental chemistry of ions—charged atoms and molecules—that enable life, electricity, and crucial chemical reactions.
https://scienceinsights.org/what-are-ions-explaining-charged…
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web search NEUTRAL — Ions are atoms that have a positive or negative charge because they have unequal numbers of protons and electrons. If atoms lose electrons, they become positive ions, or cations.
https://chem.libretexts.org/Courses/Madera_Community_College…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.