Surface chemistry of gold nanoparticles produced by laser ablation in pure and saline water
Lévy, Anna; De Anda Villa, Manuel; Laurens, Gaétan; Blanchet, Valérie; Bozek, John; Gaudin, Jérȏme; Lamour, Emily; Macé, Stéphane; Mignon, Pierre; Milosavljević, Aleksandar R.; Nicolas, Christophe; Patanen, Minna; Prigent, Christophe; Robert, Emmanuel; Steydli, Sébastien; Trassinelli, Martino; Vernhet, Dominique; Veteläinen, Onni; Amans, David (2021-05-03)
Lévy, A., De Anda Villa, M., Laurens, G., Blanchet, V., Bozek, J., Gaudin, J., Lamour, E., Macé, S., Mignon, P., Milosavljević, A. R., Nicolas, C., Patanen, M., Prigent, C., Robert, E., Steydli, S., Trassinelli, M., Vernhet, D., Veteläinen, O., & Amans, D. (2021). Surface Chemistry of Gold Nanoparticles Produced by Laser Ablation in Pure and Saline Water. Langmuir, 37(19), 5783–5794. https://doi.org/10.1021/acs.langmuir.1c00092
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see https://doi.org/10.1021/acs.langmuir.1c00092.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2021050629055
Tiivistelmä
Abstract
Pulsed laser ablation in liquid (PLAL) is a powerful method for producing nanoparticle colloids with a long-term stability despite the absence of stabilizing organic agents. The colloid stability involves different reactivities and chemical equilibria with complex ionic-specific effects at the nanoparticle/solvent interface which must be strongly influenced by their chemical composition. In this work, the surface composition of PLAL-produced gold nanoparticles in alkaline and saline (NaBr) water is investigated by X-ray photoelectron spectroscopy on free-flying nanoparticles, exempt from any substrate or radiation damage artifact. The Au 4f photoelectron spectra with a depth profiling investigation are used to evaluate the degree of nanoparticle surface oxidation. In alkaline water, the results preclude any surface oxidation contrary to the case of nanoparticles produced in NaBr solution. In addition, the analysis of Br 3d core-level photoelectron spectra agrees with a clear signature of Br on the nanoparticle surface, which is confirmed by a specific valence band feature. This experimental study is supported by DFT calculations, evaluating the energy balance of halide adsorption on different configurations of gold surfaces including oxidation or adsorbed salts.
Kokoelmat
- Avoin saatavuus [38705]