{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T20:55:02Z","timestamp":1770843302665,"version":"3.50.1"},"reference-count":63,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,3,2]],"date-time":"2020-03-02T00:00:00Z","timestamp":1583107200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["UID\/FIS\/04650\/2019"],"award-info":[{"award-number":["UID\/FIS\/04650\/2019"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/FIS-NAN\/1154\/2014"],"award-info":[{"award-number":["PTDC\/FIS-NAN\/1154\/2014"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/FIS-MAC\/32299\/2017"],"award-info":[{"award-number":["PTDC\/FIS-MAC\/32299\/2017"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["SFRH\/BD\/118684\/2016"],"award-info":[{"award-number":["SFRH\/BD\/118684\/2016"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"publisher","award":["POCI-01-0145-FEDER-016902"],"award-info":[{"award-number":["POCI-01-0145-FEDER-016902"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"publisher","award":["POCI-01-0145-FEDER-032299"],"award-info":[{"award-number":["POCI-01-0145-FEDER-032299"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Coatings"],"abstract":"<jats:p>In this work, plasmonic thin films composed of Au nanoparticles embedded in a TiO2 matrix were prepared in a transparent polymer substrate of poly(dimethylsiloxane) (PDMS). The thin films were deposited by reactive DC magnetron sputtering, and then subjected to heat treatment up to 150 \u00b0C in order to promote the growth of the Au nanoparticles throughout the TiO2 matrix. The transmittance spectrum of the thin films was monitored in situ during the heat treatment, and the minimum time required to have a defined localized surface plasmon resonance (LSPR) band was about 10 min. The average size of Au nanoparticles was estimated to be about 21 nm\u2014the majority of them are sized in the range 10\u201340 nm, but also extend to larger sizes, with irregular shapes. The refractive index sensitivity of the films was estimated by using two test fluids (H2O and DMSO), and the average value reached in the assays was 37.3 \u00b1 1.5 nm\/RIU, resulting from an average shift of 5.4 \u00b1 0.2 nm. The results show that it is possible to produce sensitive plasmonic Au-TiO2 thin films in transparent polymer substrates such as PDMS, the base material to develop microfluidic channels to be incorporated in LSPR sensing systems.<\/jats:p>","DOI":"10.3390\/coatings10030227","type":"journal-article","created":{"date-parts":[[2020,3,2]],"date-time":"2020-03-02T07:50:53Z","timestamp":1583135453000},"page":"227","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Preparation of Plasmonic Au-TiO2 Thin Films on a Transparent Polymer Substrate"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3291-0925","authenticated-orcid":false,"given":"Marco S.","family":"Rodrigues","sequence":"first","affiliation":[{"name":"Centro de F\u00edsica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6300-9243","authenticated-orcid":false,"given":"Diana I.","family":"Meira","sequence":"additional","affiliation":[{"name":"Centro de F\u00edsica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"given":"Cl\u00e1udia","family":"Lopes","sequence":"additional","affiliation":[{"name":"Centro de F\u00edsica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7421-6902","authenticated-orcid":false,"given":"Joel","family":"Borges","sequence":"additional","affiliation":[{"name":"Centro de F\u00edsica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"given":"Filipe","family":"Vaz","sequence":"additional","affiliation":[{"name":"Centro de F\u00edsica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1146\/annurev.physchem.58.032806.104607","article-title":"Localized Surface Plasmon Resonance Spectroscopy and Sensing","volume":"58","author":"Willets","year":"2007","journal-title":"Annu. 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