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Swift heavy ion-induced dissolution of gold nanoparticles in silica matrix

Abstract : Gold nanoparticles embedded in silica matrix were prepared by co-evaporation. After deposition, the samples were annealed at different temperatures in inert environment for 30 min. No signature of nanoparticle formation was found in case of as-deposited samples, while the annealed samples showed a clear signature of a surface plasmon resonance absorption peak around 520 nm, which indicated the formation of Au nanoparticles. The samples annealed at 900 °C were irradiated with 100 MeV Ag ions at fluences 2.5×1012 and 1×1013 ions/cm2. UV-visible absorption measurements of pristine and irradiated films showed a clear signature of dissolution of Au nanoparticles with ion beam fluence. X-ray diffraction studies of pristine and irradiated samples also supported the dissolution of Au nanoparticles with ion beam fluence. Rutherford backscattering spectrometry was used for quantification of gold.
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http://hal.in2p3.fr/in2p3-00169558
Contributor : Dominique Girod <>
Submitted on : Tuesday, September 4, 2007 - 1:11:30 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:34 PM

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Y.K. Mishra, D. Kabiraj, D.K. Avasthi, J.C. Pivin. Swift heavy ion-induced dissolution of gold nanoparticles in silica matrix. Radiation Effects and Defects in Solids, Taylor & Francis, 2007, 162, pp.207-213. ⟨10.1080/10420150601132883⟩. ⟨in2p3-00169558⟩

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