Raman spectroscopy and Surface Enhanced Raman Scattering (SERS) for the analysis of blue and black writing inks: identification of dye content and degradation processes

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dc.contributor.authorSaviello, Daniela
dc.contributor.authorTrabace, Maddalena
dc.contributor.authorAlyami, Abeer
dc.contributor.authorMirabile, Antonio
dc.contributor.authorBaglioni, Piero
dc.contributor.authorGiorgi, Rodorico
dc.contributor.authorIacopino, Daniela
dc.contributor.funderHorizon 2020en
dc.contributor.funderIrish Research Councilen
dc.date.accessioned2019-10-30T05:54:21Z
dc.date.available2019-10-30T05:54:21Z
dc.date.issued2019-10-25
dc.description.abstractRaman spectroscopy and Surface Enhanced Raman Scattering (SERS) were applied to the analysis of blue and black writing inks. SERS was performed by application of plasmonic nanopastes constituted by Ag nanoparticles and Au nanorods directly on inks deposited on paper substrates under laser irradiation of 514 nm. It was found that SERS spectra were largely enhanced compared to Raman spectra and that Ag nanopastes produced much larger enhancements than Au nanopastes, due to a combination of plasmonic resonance, charge transfer, and molecular resonance effects. All analyzed writing inks resulted constituted by Crystal Violet and other triarylmethane dye mixtures, to which sometimes phthalocyanine dyes were also added (for example in Bic pens). SERS was also used for the identification of degradation processes occurring in artificially aged blue pens deposited on paper substrates. It was found that color alteration changed from ink to ink and varied from darkening to discoloration to slight fading, depending on the initial chemical composition. For inks containing Crystal Violet, two mechanisms associated to de-methylation and photo-reduction of excited dye to colorless leuco forms were identified.en
dc.description.sponsorshipIrish Research Council (project GOIPD/2015/716)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid727en
dc.identifier.citationSaviello, D., Trabace, M., Alyami, A., Mirabile, A., Baglioni, P., Giorgi, R. and Iacopino, D. (2019), 'Raman Spectroscopy and Surface Enhanced Raman Scattering (SERS) for the Analysis of Blue and Black Writing Inks: Identification of Dye Content and Degradation Processes', Frontiers in Chemistry, 7, 727 (9pp) DOI: 10.3389/fchem.2019.00727en
dc.identifier.doi10.3389/fchem.2019.00727en
dc.identifier.eissn2296-2646
dc.identifier.endpage9en
dc.identifier.journaltitleFrontiers in Chemistryen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/8913
dc.identifier.volume7en
dc.language.isoenen
dc.publisherFrontiers Mediaen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::IA/646063/EU/NANOmaterials for the REStoration of works of ART/NANORESTARTen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::IA/814496/EU/Active & intelligent PAckaging materials and display cases as a tool for preventive conservation of Cultural Heritage./APACHEen
dc.rights©2019 Saviello, Trabace, Alyami, Mirabile, Baglioni, Giorgi and Iacopino. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectBallpoint pensen
dc.subjectDyesen
dc.subjectRamanen
dc.subjectPlasmonicen
dc.subjectNanopastesen
dc.subjectSERSen
dc.subjectDegradationen
dc.titleRaman spectroscopy and Surface Enhanced Raman Scattering (SERS) for the analysis of blue and black writing inks: identification of dye content and degradation processesen
dc.typeArticle (peer-reviewed)en
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