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Composition, nanostructure, and optical properties of silver and silver-copper lusters
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Image of FIG. 1.
FIG. 1.

Luster layers studied. Cie Lab* color coordinates were obtained from the UV-Vis spectra.

Image of FIG. 2.
FIG. 2.

SR-micro XRD of the luster layers. The high background corresponds to the glass substrate. The data show the difference in size and long range order of the silver metal nanoparticles present in the layers.

Image of FIG. 3.
FIG. 3.

SEM (left) and TEM (middle and right) images from r254 (top), j126 (middle), and k17 (bottom).

Image of FIG. 4.
FIG. 4.

Fitted RBS spectra corresponding to (left) the lead free glaze, the silver lustre j126, and the copper-silver lustre k17, (right) the lead bearing glaze and the silver lustre r254.

Image of FIG. 5.
FIG. 5.

(Top) Fitted silver depth profile corresponding to silver replicated lustres over lead free and lead bearing glazes, respectively, j126 (red line) and r254 (black line), (middle) fitted silver (continuous line) and copper (dashed line) depth profiles corresponding to mixed silver-copper luster produced over a lead free glaze, k17 (black line) and k14 (red line), (bottom) fitted copper depth profile from the two copper lusters produced over a lead free and lead bearing glaze, respectively, j65 (black line) and j6 (red line).12

Image of FIG. 6.
FIG. 6.

UV-Vis spectra corresponding to the samples studied: (top) silver lusters, j126 and r254, (bottom) silver-copper lusters, k17 and k14.

Image of FIG. 7.
FIG. 7.

From top to bottom, absorption, scattering and extension cross sections corresponding to the Mie calculations as a function of nanoparticle size for the lead free glass. At the bottom, full width half maximum versus peak position plot corresponding to silver metal nanoparticles of varying size in a lead free (black line) and a lead bearing glass (red line) calculated using the Mie theory.

Image of FIG. 8.
FIG. 8.

From top to bottom, simulated absorption, scattering, and extinction cross section plots corresponding to 3% (black line) and 10% (red line) volume fraction of silver nanoparticles of (left) 10 nm and (right) 30 nm size.


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Table I.

Glaze properties calculated from their composition.

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Table II.

Average composition of the lustre layers determined from RBS fittings.

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Table III.

Some properties of the luster layers calculated from the fitted RBS spectra. 〈Cu〉 and 〈Ag〉 account for the average copper and/or silver content in the layer; Cu/(Cu + Ag) for the relative proportion of copper and silver; Cumax and Agmax for the maximum concentration in the layer; fmax is the maximum volume fraction of metal nanoparticles in the layer; D/dmax is a geometrical parameter calculated after Torquato considering a random arrangement of the nanoparticles in the layer, where D is the distance between the center of consecutive particles and d is the size of the particles. The total copper and silver atoms per square centimeter, the thickness of the layer, and the position of the maximum concentration of metal particles in the layer are also given.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Composition, nanostructure, and optical properties of silver and silver-copper lusters