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Gold nanoparticles in painted miniatures on ivory: Non-invasive evidence and characterisation
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SYSNO ASEP 0567425 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gold nanoparticles in painted miniatures on ivory: Non-invasive evidence and characterisation Author(s) Širillová, Z. (CZ)
Hradilová, J. (CZ)
Pech, M. (CZ)
Švarcová, Silvie (UACH-T) SAI, RID, ORCID
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Neděla, Vilém (UPT-D) RID, ORCID, SAI
Hradil, David (UACH-T) RID, SAINumber of authors 7 Article number 111015 Source Title Dyes and Pigments. - : Elsevier - ISSN 0143-7208
Roč. 210, FEB (2023)Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords Portrait miniature ; Purple of Cassius ; Gold nanoparticles ; X-ray fluorescence ; X-ray diffraction ; Environmental scanning electron microscopy Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry R&D Projects DG18P02OVV034 GA MK - Ministry of Culture (MK) Method of publishing Limited access UT WOS 000906604200001 EID SCOPUS 85144072224 DOI 10.1016/j.dyepig.2022.111015 Annotation To document the use of gold nanoparticles (also known as ˝Purple of Cassius˝ pigment) in miniature painting, seven 19th century portraits from Czech collections containing purple colour were studied. The research was performed non-invasively, as it was not possible to sample the small-sized and delicate paintings. Large area X-ray fluorescence scanning indicated the presence of Purple of Cassius in four paintings, while in the three of them, the desired shade was achieved by mixing red and blue pigments, for example vermillion and Prussian blue. The detected gold nanoparticles were characterised in detail by X-ray powder diffraction and via innovative use of environmental scanning electron microscopy. The obtained diffraction patterns enabled the calculation of average size of the particles, which equalled to 8-14 nm. Based on available historical recipes, the pigment preparation was replicated in laboratory, yielding analogous pigment with similar particle size. For the first time, Purple of Cassius was identified and characterised in portrait miniatures. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.dyepig.2022.111015
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