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Journal Articles Nanoscale Advances Year : 2019

Doping nanoparticles using pulsed laser ablation in a liquid containing the doping agent

Julien Lam
Gilles Ledoux
Martin Nikl
  • Function : Author
Christophe Dujardin
David Amans

Abstract

While doping of semiconductors or oxides is crucial for numerous technological applications, its control remains difficult especially when the material is reduced down to the nanometric scale. In this paper, we show that pulsed laser ablation of an undoped solid target in an aqueous solution containing activator ions offers a new way to synthesise doped-nanoparticles. The doping efficiency is evaluated for laser ablation of an undoped Gd$_2$O$_3$ target in aqueous solutions of EuCl$_3$ with molar concentration from 10$^{−5}$ mol L$^{−1}$ to 10$^{−3}$ mol L$^{−1}$. Thanks to luminescence experiments, we show that the europium ions penetrate the core of the synthesised monoclinic Gd$_2$O$_3$ nanoparticles. We also show that the concentration of the activators in the nanoparticles is proportional to the initial concentration in europium ions in the aqueous solution, and a doping of about 1% ([Eu]/[Gd] atomic ratio) is reached. On the one hand, this work could open new ways for the synthesis of doped nanomaterials. On the other hand, it also raises the question of undesired penetration of impurities in laser-generated nanoparticles in liquids.
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Dates and versions

hal-02344355 , version 1 (10-12-2020)

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Arsène Chemin, Julien Lam, Gaétan Laurens, Florian Trichard, Vincent Motto-Ros, et al.. Doping nanoparticles using pulsed laser ablation in a liquid containing the doping agent. Nanoscale Advances, 2019, 1 (10), pp.3963-3972. ⟨10.1039/c9na00223e⟩. ⟨hal-02344355⟩
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