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Issue 16, 2013
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A multiscalar photoluminescence approach to discriminate among semiconducting historical zinc white pigments

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Abstract

In order to fully characterize the zinc white artists' pigment (ZnO), much used since the mid-nineteenth century, three samples collected in the early 20th century were studied using a combination of synchrotron and macroscopic photoluminescence spectroscopy and imaging. An improved microscope setup based on synchrotron microspectroscopy and microimaging was used to study the powders dispersed onto indium foil. The synchrotron setup offered a diffraction-limited resolution of 153 nm. The PL spectra of individual grains were measured and the distribution of particles' emission spectra was mapped at the nanoscale. The results revealed that while the samples have apparent homogeneous photoluminescence behavior at the macroscale (bulk), their PL signatures are inhomogeneous below 20 μm. At the nanoscale the three powder samples have quite different PL signatures. Different sources, perhaps even different batches, of zinc white might be readily differentiated using this method.

Graphical abstract: A multiscalar photoluminescence approach to discriminate among semiconducting historical zinc white pigments

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Publication details

The article was received on 18 Dec 2012, accepted on 14 Mar 2013 and first published on 14 Mar 2013


Article type: Paper
DOI: 10.1039/C3AN36874B
Citation: Analyst, 2013,138, 4463-4469
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    A multiscalar photoluminescence approach to discriminate among semiconducting historical zinc white pigments

    L. Bertrand, M. Réfrégiers, B. Berrie, J. Échard and M. Thoury, Analyst, 2013, 138, 4463
    DOI: 10.1039/C3AN36874B

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