Alkanethiol self-assembling on gold: Influence of high frequency ultrasound on adsorption kinetics and electrochemical blocking
| Autor: | Olivier Heintz, Jean-Yves Hihn, Florian Roy, Fabrice Lallemand, Virginie Moutarlier, Abdeslam Et Taouil |
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| Přispěvatelé: | Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Organic Chemistry Kinetics Analytical chemistry 02 engineering and technology Chronoamperometry 010402 general chemistry 021001 nanoscience & nanotechnology Grafting 01 natural sciences 0104 chemical sciences Inorganic Chemistry Contact angle Adsorption X-ray photoelectron spectroscopy Chemical engineering Monolayer Chemical Engineering (miscellaneous) Environmental Chemistry [CHIM]Chemical Sciences Radiology Nuclear Medicine and imaging Cyclic voltammetry 0210 nano-technology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Ultrasonics Sonochemistry Ultrasonics Sonochemistry, Elsevier, 2018, 40, pp.9-16. ⟨10.1016/j.ultsonch.2017.02.009⟩ |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2017.02.009⟩ |
| Popis: | Self-assembling of undecanthiol (C11SH) on polycrystalline gold was investigated under two different conditions. The kinetics of C11SH grafting was studied without and under high frequency ultrasound irradiation. Two electrochemical experiments were extensively carried out in order to determine electrochemical surface blocking of adsorbed layers as a function of grafting time: chronoamperometry in-situ monitoring and cyclic voltammetry. Interestingly, the grafting process is highly accelerated under sonication, and C11SH modified substrates of good quality are obtained after 3h' immersion under ultrasound irradiation. This would allow elaboration of high-quality alkanethiol modified samples within much shorter times. Water contact angle measurements and X-ray Photoelectron Spectroscopy (XPS) confirmed the presence of adsorbed undecanthiol on the gold surface. A very close link between electrochemical blocking, surface hydrophobicity and species chemical grafting was established. |
| Databáze: | OpenAIRE |
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