Raman mapping and time-resolved photoluminescence imaging for the analysis of a cross-section from a modern gypsum sculpture
| Autor: | Davide Gulotta, Saveria Mosca, ALESSIA ARTESANI, Gianluca Valentini, Sara Goidanich, Sara Mosca, Austin Nevin, Daniela Comelli |
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| Rok vydání: | 2018 |
| Předmět: |
Cross-section
Photoluminescence Materials science Raman mapping 02 engineering and technology 01 natural sciences Analytical Chemistry Cross section (physics) symbols.namesake Time-resolved photoluminescence microscopy Microscopy Spectroscopy business.industry 010401 analytical chemistry Gypsum sculpture 021001 nanoscience & nanotechnology Sample (graphics) Crystallographic defect 0104 chemical sciences Characterization (materials science) Raman spectroscopy symbols Optoelectronics 0210 nano-technology business |
| Zdroj: | Microchemical Journal. 139:500-505 |
| ISSN: | 0026-265X |
| DOI: | 10.1016/j.microc.2017.12.001 |
| Popis: | This work proposes a non-destructive multi-analytical approach, based on Raman and photoluminescence mapping to characterize the constituent materials and the stratigraphy of a multi-layer sample from a 19th century sculpture by Pompeo Marchesi. The study exploits a macro-Raman device, capable of mapping heterogeneities on a scale from sub mm2 to cm2 without the need for refocusing. The combination of the macro-Raman probe with a more conventional micro-probe improves the quality of Raman spectra and allows the material identification with a high level of confidence. Time-resolved photoluminescence microscopy allows the mapping of photoluminescent centres in the micro-sample, ascribed to crystal defects in inorganic materials. The proposed combination of optical analytical techniques provides an in-depth characterization of the constituent materials of the sample, yielding insights on its conservation history. The protocol could be potentially extended to the analysis of cross-sections of paintings. |
| Databáze: | OpenAIRE |
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