QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire
| dc.contributor.author | Batista A.J. | |
| dc.contributor.author | Vianna P.G. | |
| dc.contributor.author | Ribeiro H.B. | |
| dc.contributor.author | Matos C.J.S. | |
| dc.contributor.author | Gomes A.S.L. | |
| dc.date.accessioned | 2024-03-12T23:51:02Z | |
| dc.date.available | 2024-03-12T23:51:02Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | © 2019, The Author(s).This paper reports on a micro-certification procedure using femtosecond laser irradiation to microscopically mark a single-crystalline gemological and natural diamond, synthetic ruby and synthetic sapphire, inscribing a QR Code on them. The QR-code was composed of a set of 25 × 25 micropoints, and the irradiation energy was optimized at 1kHz repetition rate. The code was made at a 20 µm relative depth into the gemstone surfaces by controlling the incident laser energy, that was set to 3 μJ for all the samples. Characterization by optical and electron microscopy, as well as micro-Raman hyperspectral imaging showed that the microdots have a diameter of about 14 µm perpendicular to the irradiation direction, being laterally spaced by 14 µm-18 µm applied for each sample. This work corroborates the feasibility of using ultrafast laser inscription technology to fabricate microdots with great quality on gemstone surfaces, which offers a great potential for the jewelry industry to safely micro-encrypt gemological certifications. The compositional and morphological characterization of the modified surface was carried by micro-Raman spectroscopy and scanning electron microscopy. | |
| dc.description.issuenumber | 1 | |
| dc.description.volume | 9 | |
| dc.identifier.doi | 10.1038/s41598-019-45405-7 | |
| dc.identifier.issn | 2045-2322 | |
| dc.identifier.uri | https://dspace.mackenzie.br/handle/10899/35153 | |
| dc.relation.ispartof | Scientific Reports | |
| dc.rights | Acesso Aberto | |
| dc.title | QR code micro-certified gemstones: femtosecond writing and Raman characterization in Diamond, Ruby and Sapphire | |
| dc.type | Artigo | |
| local.scopus.citations | 9 | |
| local.scopus.eid | 2-s2.0-85067607834 | |
| local.scopus.updated | 2024-05-01 | |
| local.scopus.url | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85067607834&origin=inward |