Christoph Bruckschlegel, Coralie Pasquier, Guillaume Toquer, Luc Girard, Michael Odorico, Joseph Lautru, Olivier Diat, Pierre Bauduin
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, α-SiW12 O40 4- , α-PW12 O40 3- , and B12 I12 2- , with decreasing charge density or increasing superchaotropicity (or hydrophobicity), on hydrophilic solid surfaces, PEGylated gold nanoparticles, and PEGylated gold-coated quartz crystal...
April 18, 2024: Journal of Physical Chemistry Letters