Electrochemical characterization of biodeterioration of paint films containing cadmium yellow pigment

Annette Suleika Ortiz Miranda, Antonio Doménech-Carbó, María Teresa Doménech-Carbó, Laura Osete-Cortina, Francisco M. Valle-Algarra, Fernando Bolívar- Galiano, Inés Martín- Sánchez, María del Mar López-Miras

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The voltammetry of microparticles (VMP) methodology was used to characterize the biological attack of different bacteria and fungi to reconstructed egg tempera and egg–linseed oil emulsion paint films containing cadmium yellow (CdS), which mimic historical painting techniques. When these paint films are in contact with aqueous acetate buffer, different cathodic signals are observed. As a result of the crossing of VMP data with attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), scanning electrochemical microscopy (SECM), field emission scanning electron microscopy (FESEM), and atomic force microscopy (AFM), these voltammetric signals can be associated with the reduction of CdS and different complexes associated to the proteinaceous and fatty acid fractions of the binders. After biological attack with different fungi (Acremonium chrysogenum, Aspergillus niger, Mucor rouxii, Penicillium chrysogenum, and Trichoderma pseudokoningii) and bacteria (Arthrobacter oxydans, Bacillus amyloliquefaciens, and Streptomyces cellulofans), the observed electrochemical signals experience specific modifications depending on the binder and the biological agent, allowing for an electrochemical monitoring of biological attack.
TidsskriftJournal of Solid State Electrochemistry
Sider (fra-til)3287- 3302
Antal sider15
StatusUdgivet - 15 aug. 2016
Udgivet eksterntJa