Evidence map›Paper›PMID 39792292›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2025

Strong adsorption of guanidinium cations to the air-water interface.

Franky Bernal, Amro Dodin, Constantine Kyprianou, David T Limmer, Richard J Saykally

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Strong adsorption of guanidinium cations to the air-water interface.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Franky BernalDepartment of Chemistry, University of California, Berkeley, CA 94720.ORCID 0000-0001-6653-6367
Amro DodinChemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720.
Constantine KyprianouDepartment of Chemistry, University of California, Berkeley, CA 94720.
David T LimmerDepartment of Chemistry, University of California, Berkeley, CA 94720.ORCID 0000-0002-2766-0688
Richard J SaykallyDepartment of Chemistry, University of California, Berkeley, CA 94720.

Funding

DOE | SC | Basic Energy Sciences (BES) #CH403503DOE | SC | Basic Energy Sciences (BES) DE-AC02-05CH11231
6 · The paper itself

Abstract

Combining Deep-UV second harmonic generation spectroscopy with molecular simulations, we confirm and quantify the specific adsorption of guanidinium cations to the air-water interface. Using a Langmuir analysis of measurements at multiple concentrations, we extract the Gibbs free energy of adsorption, finding it larger than typical thermal energies. Molecular simulations clarify the role of polarizability in tuning the thermodynamics of adsorption, and establish the preferential parallel alignment of guanidinium at the air-water interface. As a polyatomic cation, guanidinium represents one of the few examples of a positively charged species to exhibit a propensity for the air-water interface. As such, these results expand on the growing body of work on specific ion adsorption.

Indexed as

aqueous interfacesion adsorptionion effectsLangmuir isothermnonlinear spectroscopy

Identifiers

PMID39792292
PMCPMC11745392

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.