Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation - Archive ouverte HAL Access content directly
Journal Articles Langmuir Year : 2019

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

David Amans
John Bozek
Christophe Nicolas
  • Function : Author
  • PersonId : 759783
  • IdRef : 075098865
Minna Patanen
Emmanuel Robert
Anna Lévy

Abstract

The surface chemistry of gold nanoparticles produced by the pulsed laser ablation in liquids method is investigated by X-ray photoelectron spectroscopy (XPS). The presence of surface oxide expected on these systems is investigated using synchrotron radiation in conditions close to their original state in solvent but free from substrate or solvent effects which could affect the interpretation of spectroscopic observations. For that purpose we performed the experiment on a controlled free-standing nanoparticle beam produced by combination of an atomizer and an aerodynamic lens system. These results are compared with those obtained by the standard situation of deposited nanoparticles on silicon substrate. An accurate analysis based on Bayesian statistics concludes that the existence of oxide in the free-standing conditions cannot be solely confirmed by the recorded core-level 4f spectra. If present, our data indicate an upper limit of 2.15 ± 0.68% of oxide. However, a higher credence to the hypothesis of its existence is brought by the structureless valence profile of the free-standing beam. Moreover, the cross-comparison with the deposited nanoparticles case clearly evidences an important misleading substrate effect. Experiment with free-standing nanoparticles is then demonstrated to be the right way to further investigate oxidation states on Au nanoparticles.
Fichier principal
Vignette du fichier
De Anda Villa et al. - 2019 - Assessing the Surface Oxidation State of Free-Stan.pdf (1.43 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02326073 , version 1 (18-12-2019)

Identifiers

Cite

Manuel de Anda Villa, Jérôme Gaudin, David Amans, Fahima Boudjada, John Bozek, et al.. Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation. Langmuir, 2019, 35 (36), pp.11859-11871. ⟨10.1021/acs.langmuir.9b02159⟩. ⟨hal-02326073⟩
173 View
372 Download

Altmetric

Share

Gmail Facebook X LinkedIn More