Bruckschlegel, Christoph and Pasquier, Coralie and Toquer, Guillaume and Girard, Luc and Odorico, Michael and Lautru, Joseph and Diat, Olivier and Bauduin, Pierre (2024) Toward Distinguishing between the Superchaotropic and Hydrophobic Characters of Nanometric-Sized Ions in Interaction with PEGylated Surfaces. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 15 (15). pp. 4229-4236. ISSN 1948-7185
Full text not available from this repository. (Request a copy)Abstract
In this study, we explore the superchaotropic effect of various polyoxometalate or boron cluster nano-ions on hydrophilic neutral surfaces. Nano-ions, characterized by low charge densities, exhibit strong adsorption on non-ionic hydrophilic surfaces like PEGylated micelles. This adsorption phenomenon was attributed to the enthalpically favorable dehydration of nano-ions, the so-called superchaotropic effect. Here, we investigate the adsorption of three nano-ions, alpha-SiW12O404-, alpha-PW12O403-, and B12I122-, with decreasing charge density or increasing superchaotropicity (or hydrophobicity), on hydrophilic solid surfaces, PEGylated gold nanoparticles, and PEGylated gold-coated quartz crystal. Solid surfaces are devoid of hydrophobic regions, enabling the study of the subtle nuance between hydrophobic and superchaotropic effects. Unlike adsorption on PEGylated micelles, the adsorption constant decreases with a reduced charge density, aligning with the well-established principle that hydrophobic ions do not adsorb on hydrophilic surfaces. This research improves our understanding of the subtle difference between superchaotropic and hydrophobic effects in nano-ion adsorption phenomena. Read this Article
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FUNCTIONAL MATERIAL; GOLD; WATER; ELECTROCHEMISTRY; NANOPARTICLES; EVOLUTION |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Dec 2025 08:43 |
| Last Modified: | 04 Dec 2025 08:43 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64566 |
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