Colour degradation of artworks: an ab-initio approach to X-ray, electronic and optical spectroscopy analyses of vermilion photodarkening (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Colour degradation of artworks: an ab-initio approach to X-ray, electronic and optical spectroscopy analyses of vermilion photodarkening (Articolo in rivista) (literal)

Anno

• 2015-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1039/C4JA00327F (literal)

Alternative label

• Conor Hogan and Fabiana Da Pieve (2015)
  Colour degradation of artworks: an ab-initio approach to X-ray, electronic and optical spectroscopy analyses of vermilion photodarkening
  in Journal of analytical atomic spectrometry (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Conor Hogan and Fabiana Da Pieve (literal)

Pagina inizio

• 588 (literal)

Pagina fine

• 598 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://pubs.rsc.org/en/content/articlelanding/2014/ja/c4ja00327f (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 30 (literal)

Rivista

• Journal of analytical atomic spectrometry (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 11 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 3 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Consiglio Nazionale delle Ricerche, Istituto di Struttura della Materia (CNR-ISM), via Fosso del Cavaliere 100, 00133 Rome, Italy; Department of Physics and European Theoretical Spectroscopy Facility (ETSF), Università di Roma \"Tor Vergata\", Via della Ricerca Scientifica 1, 00133 Rome, Italy Laboratoire des Solides Irradiés, UMR 7642, CNRS-CEA/DSM, École Polytechnique, F-91128 Palaiseau, France and European Theoretical Spectroscopy Facility (ETSF) (literal)

Titolo

• Colour degradation of artworks: an ab-initio approach to X-ray, electronic and optical spectroscopy analyses of vermilion photodarkening (literal)

Abstract

• Light-induced photodarkening of the pigment vermilion (?-HgS, cinnabar), observed in historical museum paintings and in murals at archaelogical sites worldwide, is an intriguing phenomenon that has triggered intense study using microscopy and spectroscopy techniques. However, the origins of the degradation and the nature of the concomitant physical, chemical and structural transformations are not yet completely clear. We present a first-principles study based on state-of-the-art electronic structure methods which sheds light on this darkening phenomena. The presence of secondary compounds proposed to form during the transformation of vermilion (Hg3S2Cl2 polymorphs, Hg2Cl2, and HgCl2 ) is confirmed using X-ray spectroscopy simulations, and their structural, electronic, and optical properties are analysed using different levels of theory and compared with experimental observations. A scheme for growth of ?-Hg3S2Cl2 on ?-HgS is proposed, and possible formation and decomposition paths for the mercury chlorides are discussed. Approximations used in computing band gaps and band edges are examined in detail. This work highlights the key role that first-principles methods can play in the application of materials science to art conservation. (literal)

Prodotto di

• Institute of structure of matter (ISM) (Istituto)
• Microscopia a Scansione a Sonda Locale su sistemi nanostrutturati e materiali biologici (MD.P06.006.001) (Modulo)

Autore CNR

• CONOR DAVID HOGAN (Unità di personale interno)

Incoming links:

Prodotto

• Institute of structure of matter (ISM) (Istituto)
• Microscopia a Scansione a Sonda Locale su sistemi nanostrutturati e materiali biologici (MD.P06.006.001) (Modulo)

Autore CNR di

• CONOR DAVID HOGAN (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of analytical atomic spectrometry (Rivista)