2015 |
Campos-Vallette, M; Aguayo, T Vibrational Spectroscopy for the Study of Chilean Cultural Heritage Artículo de revista Heritage Science, 3 , 2015, ISSN: 2050-7445. Resumen | Enlaces | BibTeX | Etiquetas: art, enhanced ft-raman, identification, iron-oxides, micro-raman, microspectroscopy paintings, pigments, raman-scattering, spectra @article{RN263, title = {Vibrational Spectroscopy for the Study of Chilean Cultural Heritage}, author = { M. Campos-Vallette and T. Aguayo}, url = {/brokenurl#<Go to ISI>://WOS:000356922100001}, doi = {10.1186/s40494-015-0047-0}, issn = {2050-7445}, year = {2015}, date = {2015-01-01}, journal = {Heritage Science}, volume = {3}, abstract = {Background: Natural and synthetic colouring products along with its associated supporting materials have been studied in several expressions of the Chilean cultural heritage using vibrational spectroscopy. These expressions include archaeological remains as well as works of art., Results: Among the materials studied so far we can count pigments found in archaeological sites from the north of Chile, in plaster (wall paintings) and in polychrome (beams), and dyes mainly related to added components on historic silk textiles. Identification of materials resulted to be relevant to know about Chilean culture through history., Conclusions: The vibrational knowledge obtained contributes to give solid data as a complement to the different information aspects collected by conservation professionals involved in the characterization and conservation procedures of cultural heritage and also it gives us the opportunity to share knowledge and to give value to objects that not always are of the public domain.}, keywords = {art, enhanced ft-raman, identification, iron-oxides, micro-raman, microspectroscopy paintings, pigments, raman-scattering, spectra}, pubstate = {published}, tppubtype = {article} } Background: Natural and synthetic colouring products along with its associated supporting materials have been studied in several expressions of the Chilean cultural heritage using vibrational spectroscopy. These expressions include archaeological remains as well as works of art., Results: Among the materials studied so far we can count pigments found in archaeological sites from the north of Chile, in plaster (wall paintings) and in polychrome (beams), and dyes mainly related to added components on historic silk textiles. Identification of materials resulted to be relevant to know about Chilean culture through history., Conclusions: The vibrational knowledge obtained contributes to give solid data as a complement to the different information aspects collected by conservation professionals involved in the characterization and conservation procedures of cultural heritage and also it gives us the opportunity to share knowledge and to give value to objects that not always are of the public domain. |
2013 |
Sepulveda, M; Gutierrez, S; Campos-Vallette, M; Clavijo, E; Walter, P; Carcamo, J J Raman Spectroscopy and X-Ray Fluorescence in Molecular Analysis of Yellow Blocks from the Archeological Site Playa Miller 7 (Northern Chile) Artículo de revista Journal of the Chilean Chemical Society, 58 (3), pp. 1836-1839, 2013, ISSN: 0717-9707. Resumen | Enlaces | BibTeX | Etiquetas: art, chile, diagnosis, fluorescence, identification, jarosite, micro-raman, northern pigments, raman spectra spectroscopy, x-ray @article{RN152, title = {Raman Spectroscopy and X-Ray Fluorescence in Molecular Analysis of Yellow Blocks from the Archeological Site Playa Miller 7 (Northern Chile)}, author = { M. Sepulveda and S. Gutierrez and M. Campos-Vallette and E. Clavijo and P. Walter and J.J. Carcamo}, url = {/brokenurl#<Go to ISI>://WOS:000331238200008}, doi = {10.4067/S0717-97072013000300008}, issn = {0717-9707}, year = {2013}, date = {2013-01-01}, journal = {Journal of the Chilean Chemical Society}, volume = {58}, number = {3}, pages = {1836-1839}, abstract = {Yellow blocks from the archaeological site Playa Miller 7 (PLM7), on the coast of Atacama Desert in northern Chile, were analyzed by Raman spectroscopy and X-ray fluorescence (XRF) portable. Our results identify for the first time the use of K-jarosite and natrojarosite in prehispanic times (approx. 2500 year BP). In search of a possible source of supply for this mineral hydrothermal origin, our surveys were focused on Andean geothermal areas with identification, so far, from a single source in the region of Arica and Parinacota: Jurasi (JU), located at 4000 mamsl. Comparison of the Raman spectra between samples archaeological and Jurasi, allow us to infer that this hydrothermal source could be used as obtaining source of yellow pigment by prehispanic inhabitant of Formative period (3700-1500 years B.P.).}, keywords = {art, chile, diagnosis, fluorescence, identification, jarosite, micro-raman, northern pigments, raman spectra spectroscopy, x-ray}, pubstate = {published}, tppubtype = {article} } Yellow blocks from the archaeological site Playa Miller 7 (PLM7), on the coast of Atacama Desert in northern Chile, were analyzed by Raman spectroscopy and X-ray fluorescence (XRF) portable. Our results identify for the first time the use of K-jarosite and natrojarosite in prehispanic times (approx. 2500 year BP). In search of a possible source of supply for this mineral hydrothermal origin, our surveys were focused on Andean geothermal areas with identification, so far, from a single source in the region of Arica and Parinacota: Jurasi (JU), located at 4000 mamsl. Comparison of the Raman spectra between samples archaeological and Jurasi, allow us to infer that this hydrothermal source could be used as obtaining source of yellow pigment by prehispanic inhabitant of Formative period (3700-1500 years B.P.). |
Aguayo, T; Garrido, C; Clavijo, E; Gomez-Jeria, J S; Monasterio, C A; Icaza, M; Moraga, F E; Campos-Vallette, M Raman and Surface Enhanced Raman Scattering of a Black Dyed Silk Artículo de revista Journal of Raman Spectroscopy, 44 (9), pp. 1238-1245, 2013, ISSN: 0377-0486. Resumen | Enlaces | BibTeX | Etiquetas: aromatic-hydrocarbons, art, dye, fibroin, gagags, microscopy, model, nmr polycyclic raman, resonance sers, silk, spectroscopy @article{RN153, title = {Raman and Surface Enhanced Raman Scattering of a Black Dyed Silk}, author = { T. Aguayo and C. Garrido and E. Clavijo and J.S. Gomez-Jeria and C.A. Monasterio and M. Icaza and F.E. Moraga and M. Campos-Vallette}, url = {/brokenurl#<Go to ISI>://WOS:000323784900005}, doi = {10.1002/jrs.4348}, issn = {0377-0486}, year = {2013}, date = {2013-01-01}, journal = {Journal of Raman Spectroscopy}, volume = {44}, number = {9}, pages = {1238-1245}, publisher = {2013 John Wiley & Sons, Ltd.}, abstract = {The Raman and surface enhanced Raman scattering (SERS) spectra of a black dyed silk sample (BDS) were registered. The spectral analysis was performed on the basis of Raman and SERS spectral data of isolated samples of Bombyx mori silk fibroin, its motif peptide component (GAGAGS) and the synthetic reactive black 5 dye (RB5). The macro FT-Raman spectrum of the silk sample is consistent with a silk II-Cp crystalline fraction of Bombyx mori silk fibroin; the SERS spectrum is highly consistent with conformational modifications of the fibroin due to the interactions with the Ag nanoparticles. The GAGAGS peptide sequence dominates the Raman spectrum of the silk. The SERS spectrum of the peptide suggests a random coil conformation imposed by the surface interaction; the serine residue in the new conformation is exposed to the surface. Quantum chemical calculations for a model of the GAGAGS-Ag surface predict a nearly extended conformation at the Ag surface. The Raman spectrum of the dye was analysed, and a complete band assignment was proposed; it was not possible to propose a preferential orientation or organization of the molecule on the metal surface. Quantum chemical calculations for a model of the dye interacting with a silver surface predict a rather coplanar orientation of the RB5 on the Ag metal surface. The Raman spectrum of the BDS sample is dominated by signals from the dye; the general spectral behaviour indicates that the dye mainly interacts with the silk through the sulphone (-SO2-) and sulphonate (-SO2-O-) groups. Besides the presence of dye signals, mainly ascribed to the sulphone and sulphonate bands, the SERS spectrum of the BDS sample also displays bands belonging to the amino acids alanine, glycine, serine and particularly tyrosine.}, keywords = {aromatic-hydrocarbons, art, dye, fibroin, gagags, microscopy, model, nmr polycyclic raman, resonance sers, silk, spectroscopy}, pubstate = {published}, tppubtype = {article} } The Raman and surface enhanced Raman scattering (SERS) spectra of a black dyed silk sample (BDS) were registered. The spectral analysis was performed on the basis of Raman and SERS spectral data of isolated samples of Bombyx mori silk fibroin, its motif peptide component (GAGAGS) and the synthetic reactive black 5 dye (RB5). The macro FT-Raman spectrum of the silk sample is consistent with a silk II-Cp crystalline fraction of Bombyx mori silk fibroin; the SERS spectrum is highly consistent with conformational modifications of the fibroin due to the interactions with the Ag nanoparticles. The GAGAGS peptide sequence dominates the Raman spectrum of the silk. The SERS spectrum of the peptide suggests a random coil conformation imposed by the surface interaction; the serine residue in the new conformation is exposed to the surface. Quantum chemical calculations for a model of the GAGAGS-Ag surface predict a nearly extended conformation at the Ag surface. The Raman spectrum of the dye was analysed, and a complete band assignment was proposed; it was not possible to propose a preferential orientation or organization of the molecule on the metal surface. Quantum chemical calculations for a model of the dye interacting with a silver surface predict a rather coplanar orientation of the RB5 on the Ag metal surface. The Raman spectrum of the BDS sample is dominated by signals from the dye; the general spectral behaviour indicates that the dye mainly interacts with the silk through the sulphone (-SO2-) and sulphonate (-SO2-O-) groups. Besides the presence of dye signals, mainly ascribed to the sulphone and sulphonate bands, the SERS spectrum of the BDS sample also displays bands belonging to the amino acids alanine, glycine, serine and particularly tyrosine. |
2011 |
Aguayo, T; Clavijo, E; Eisner, F; Ossa-Izquierdo, C; Campos-Vallette, M Raman Spectroscopy in the Diagnosis of the Wall Painting History of Concepcion, Chile Artículo de revista Journal of Raman Spectroscopy, 42 (12), pp. 2143-2148, 2011, ISSN: 0377-0486. Resumen | Enlaces | BibTeX | Etiquetas: analysis, art, calcium, conservation, cultural-heritage, fluorescence ft-raman, identification, nondestructive of painting, pigment pigments, raman spectra, spectroscopy, wall work @article{RN40b, title = {Raman Spectroscopy in the Diagnosis of the Wall Painting History of Concepcion, Chile}, author = { T. Aguayo and E. Clavijo and F. Eisner and C. Ossa-Izquierdo and M. Campos-Vallette}, url = {/brokenurl#<Go to ISI>://WOS:000298581500013}, doi = {10.1002/jrs.2978}, issn = {0377-0486}, year = {2011}, date = {2011-01-01}, journal = {Journal of Raman Spectroscopy}, volume = {42}, number = {12}, pages = {2143-2148}, publisher = {2011 John Wiley & Sons, Ltd.}, abstract = {Pigments and fresco-related materials from the wall painting Historia de Concepcion by Gregorio De La Fuente in Concepcion, Chile were identified by Raman microscopy. The pigments were compared with those obtained from the artist's studio, and results allowed inference about subsequent interventions. Materials coming from processes such as salt efflorescence were also studied. The results contribute to the diagnosis of the current conservation state of the wall painting for its future restoration.}, keywords = {analysis, art, calcium, conservation, cultural-heritage, fluorescence ft-raman, identification, nondestructive of painting, pigment pigments, raman spectra, spectroscopy, wall work}, pubstate = {published}, tppubtype = {article} } Pigments and fresco-related materials from the wall painting Historia de Concepcion by Gregorio De La Fuente in Concepcion, Chile were identified by Raman microscopy. The pigments were compared with those obtained from the artist's studio, and results allowed inference about subsequent interventions. Materials coming from processes such as salt efflorescence were also studied. The results contribute to the diagnosis of the current conservation state of the wall painting for its future restoration. |
2015 |
Vibrational Spectroscopy for the Study of Chilean Cultural Heritage Artículo de revista Heritage Science, 3 , 2015, ISSN: 2050-7445. |
2013 |
Raman Spectroscopy and X-Ray Fluorescence in Molecular Analysis of Yellow Blocks from the Archeological Site Playa Miller 7 (Northern Chile) Artículo de revista Journal of the Chilean Chemical Society, 58 (3), pp. 1836-1839, 2013, ISSN: 0717-9707. |
Raman and Surface Enhanced Raman Scattering of a Black Dyed Silk Artículo de revista Journal of Raman Spectroscopy, 44 (9), pp. 1238-1245, 2013, ISSN: 0377-0486. |
2011 |
Raman Spectroscopy in the Diagnosis of the Wall Painting History of Concepcion, Chile Artículo de revista Journal of Raman Spectroscopy, 42 (12), pp. 2143-2148, 2011, ISSN: 0377-0486. |