دورية أكاديمية
Water Solvation of Charged and Neutral Gold Nanoparticles
| العنوان: | Water Solvation of Charged and Neutral Gold Nanoparticles |
|---|---|
| المؤلفون: | Novelli, F., Lopez, M., Schwaab, G., Roldan Cuenya, B., Havenith, M. |
| المصدر: | The Journal of Physical Chemistry B |
| سنة النشر: | 2019 |
| المجموعة: | Max Planck Society: MPG.PuRe |
| الوصف: | Gold nanoparticles are unique electrocatalysts for oxygen reduction, carbon dioxide reduction, and alcohol oxidation. Electrocatalytic processes are influenced by the interaction with the solvent, yet the direct investigation of the solvation of nanoparticles is scarce. Here we select gold nanoparticles as ~10 nm sized solutes of which we can control the charge. We perform mid‐infr ared and terahertz spectroscopy to compare the behavior of the water in solution with micelles loaded with neutral and positive gold nanoparticles. We find indications that the hydration water aro und the gold‐loaded micelles is characterized by weaker hydrogen bonds than bulk water. A positive nanoparticle charge is observed to result in a larger blue shift of the OH stretch, quenches the intensity of the collective translational mode, and increases the absorption by librating water molecules. Water at the interface of a positive gold nanoparticle could experience a stiffer potential energy surface which, in turn, might unveil local thermodynamic properties. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | info:eu-repo/grantAgreement/EC/H2020/695437; http://hdl.handle.net/21.11116/0000-0003-F53E-4Test; http://hdl.handle.net/21.11116/0000-0003-F540-0Test |
| الإتاحة: | https://doi.org/10.1021/acs.jpcb.9b02358Test http://hdl.handle.net/21.11116/0000-0003-F53E-4Test http://hdl.handle.net/21.11116/0000-0003-F540-0Test |
| حقوق: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.FD6841F6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |