Physico-chemical environment of Al impurity atoms in amorphous silica

Jonnard, P.; Morreeuw, J. P.; Bercegol, Herve

doi:10.1051/epjap:2002109

Cited by 3 publications

(2 citation statements)

References 9 publications

(9 reference statements)

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“…However, the shifts are quite small, a few tenths of eV. Nevertheless these lines are very intense and so could be useful to study the electronic structure of dilute alloys (Jonnard et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Characterization of Al and Mg Alloys from Their X-Ray Emission Bands

et al. 2009

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The valence states of Mg-Al alloys are compared to those of reference materials (pure Mg and Al metals, and intermetallics). Two methods based on x-ray emission spectroscopy are proposed to determine the phases and their proportion: first, by analyzing the Al valence spectra of the Mg-rich alloys and the Mg valence spectra of the Al-rich alloys; second by fitting with a linear combination of the reference spectra the Al spectra of the Al-rich alloys and the Mg spectra of the Mg-rich alloys. This enables us to determine that Al and Al 3 Mg 2 are present in the 0 -43.9 wt% Al composition range and Mg and Al 12 Mg 17 are present in the 62.5 -100 wt% Al composition range. In the 43.9 -62.5%Al range, the alloy is single phase and an underestimation of the Al content of the alloy can be estimated from the comparison of the bandwidth of the alloy spectrum to the bandwidths of the reference spectra.

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Section: Discussionmentioning

confidence: 99%

Characterization of Al and Mg Alloys from Their X-Ray Emission Bands

et al. 2009

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“…40 To better describe the defects inside the laser optics, a study of dielectric nanoparticles in silica films can be envisaged. Then, one expects that the damages sites inside the silica would be produced at much higher fluences than with metallic nanoparticles, i.e., in conditions closer to that of the presently chosen optical components for the megajoule laser.…”

Section: Discussionmentioning

confidence: 99%

X-ray spectroscopy study of electronic structure of laser-irradiated Au nanoparticles in a silica film

Jonnard

Bercegol

Lamaignère

et al. 2005

Journal of Applied Physics

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The electronic structure of gold nanoparticles embedded in a silica film is studied, both before and after irradiation at 355 nm by a laser. The Au 5d occupied valence states are observed by x-ray emission spectroscopy. They show that before irradiation the gold atoms are in metallic states within the nanoparticles. After irradiation with a fluence of 0.5 J/cm2, it is found that gold valence states are close to those of a metal-poor gold silicide; thanks to a comparison of the experimental Au 5d states with the calculated ones for gold silicides using the density-functional theory. The formation of such a compound is driven by the diffusion of the gold atoms into the silica film upon the laser irradiation. At higher fluence, 1 J/cm2, we find a higher percentage of metallic gold that could be attributed to annealing in the silica matrix

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Nanometer‐designed Al/SiC periodic multilayers: characterization by a multi‐technique approach

Galtayries

Guen

et al. 2010

Surface & Interface Analysis

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Physico-chemical environment of Al impurity atoms in amorphous silica

Cited by 3 publications

References 9 publications

Characterization of Al and Mg Alloys from Their X-Ray Emission Bands

Characterization of Al and Mg Alloys from Their X-Ray Emission Bands

X-ray spectroscopy study of electronic structure of laser-irradiated Au nanoparticles in a silica film

Nanometer‐designed Al/SiC periodic multilayers: characterization by a multi‐technique approach

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