Controlling the size distribution of embedded Au nanoparticles using ion irradiation

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3372745· OSTI ID:21476267

Ramjauny, Y; Rizza, G ^[1]; Perruchas, S; Gacoin, T ^[2]; Botha, R ^[3]

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1. Laboratoire des Solides Irradies, Ecole Polytechnique, CEA-IRAMIS, CNRS, 91128 Palaiseau Cedex (France)
2. Laboratoire de Physique de la Matiere Condensee, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex (France)
3. Laboratoire de Physique des Interfaces et des Couches Minces, Ecole Polytechnique, 91128 Palaiseau Cedex (France)

Samples composted of chemically synthesized Au nanoparticles (NPs) (16.0{+-}2.0 nm) embedded within a planar silica film are used as model system to investigate the evolution of a second phase under irradiation when the temperature and the ion stopping power are changed. Samples are irradiated with 4 MeV Au{sup 2+} ions and 4 MeV Br{sup 2+} ions for temperature ranging from 30 deg. C up to 800 deg. C and for fluences up to 8x10{sup 16} cm{sup -2}. We show that at room temperature the complete dissolution of the NPs leads to the formation of smaller precipitates with a narrower size distribution, i.e., 2.0{+-}0.3 nm. However, when the temperature is increased and/or the nuclear stopping power is decreased, a reduction in the dissolution rate was observed. This leads to the formation of a bimodal size distribution. Finally, the evolution of the density of the precipitates with the temperature is discussed in term of the thermal stability of the irradiation-induced defects within the silica matrix.

• OSTI ID: 21476267
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 10; Other Information: DOI: 10.1063/1.3372745; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
DISSOLUTION
GOLD IONS
ION BEAMS
IRRADIATION
MATRIX MATERIALS
MEV RANGE
NANOSTRUCTURES
PARTICLES
PHASE STABILITY
PHYSICAL RADIATION EFFECTS
PRECIPITATION
SILICA
STOPPING POWER
TEMPERATURE DEPENDENCE
BEAMS
CHARGED PARTICLES
ENERGY RANGE
IONS
MATERIALS
MINERALS
OXIDE MINERALS
RADIATION EFFECTS
SEPARATION PROCESSES
STABILITY