{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T06:14:36Z","timestamp":1778652876594,"version":"3.51.4"},"reference-count":16,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,8,27]],"date-time":"2018-08-27T00:00:00Z","timestamp":1535328000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003286","name":"Kuwait Foundation for the Advancement of Sciences","doi-asserted-by":"publisher","award":["PR17-15EE-01"],"award-info":[{"award-number":["PR17-15EE-01"]}],"id":[{"id":"10.13039\/501100003286","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Ceria nanoparticles have been recently used as an optical fluorescent material with visible emission under ultraviolet excitation, due to the formation of trivalent cerium ions with corresponding oxygen vacancies. This paper introduces the enhancement of both fluorescence emission and lifetime through adding gold nanoparticles. The reason is due to possible coupling between the plasmonic resonance of gold nanoparticles and the fluorescence emission of ceria that has been achieved, along with enhanced formation of trivalent cerium ions. Both factors lead to higher fluorescence intensity peaks and shorter fluorescence lifetimes. As an application, gold-ceria nanoparticles have been used as an optical sensing material for lead particles in aqueous media based on fluorescence quenching. Stern-Volmer constant of in-situ gold-ceria nanoparticles is found to be 2.424 M\u22121, with a relative intensity change of up to 40% at 0.2 g\/L.<\/jats:p>","DOI":"10.3390\/s18092818","type":"journal-article","created":{"date-parts":[[2018,8,27]],"date-time":"2018-08-27T10:56:04Z","timestamp":1535367364000},"page":"2818","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2913-4825","authenticated-orcid":false,"given":"Nader","family":"Shehata","sequence":"first","affiliation":[{"name":"Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt"},{"name":"Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt"},{"name":"USTAR Bio-Innovation Center, Utah State University, Logan, UT 84341, USA"},{"name":"Kuwait College of Science and Technology, Doha Area, 7th Ring Road, Safat 13133, Kuwait"},{"name":"The Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Effat","family":"Samir","sequence":"additional","affiliation":[{"name":"Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt"},{"name":"Department of Electrical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ishac","family":"Kandas","sequence":"additional","affiliation":[{"name":"Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt"},{"name":"Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt"},{"name":"Kuwait College of Science and Technology, Doha Area, 7th Ring Road, Safat 13133, Kuwait"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,8,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1007\/s12566-012-0032-y","article-title":"Indicators for optical oxygen sensors","volume":"2","author":"Quaranta","year":"2012","journal-title":"Bioanal. 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Part A"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"399","DOI":"10.2217\/17435889.1.4.399","article-title":"Radical nanomedicine","volume":"1","author":"Rzigalinski","year":"2006","journal-title":"Nanomedicine"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"20193","DOI":"10.3390\/s150820193","article-title":"Nano-Enriched and Autonomous Sensing Framework for Dissolved Oxygen","volume":"15","author":"Shehata","year":"2015","journal-title":"Sensors"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1173","DOI":"10.1007\/s11051-012-1173-1","article-title":"Control of oxygen vacancies and Ce+3 concentrations in doped ceria nanoparticles via the selection of lanthanide element","volume":"14","author":"Shehata","year":"2012","journal-title":"J. Nanopart. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"3682","DOI":"10.1016\/j.apsusc.2010.11.107","article-title":"Formation of alumina-ceria mixed oxide in model systems","volume":"257","author":"Skala","year":"2011","journal-title":"Appl. Surf. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1186\/1556-276X-9-231","article-title":"Reduced erbium-doped ceria nanoparticles: One nano-host applicable for simultaneous optical down- and up-conversions","volume":"9","author":"Shehata","year":"2014","journal-title":"Nanoscale Res. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1002\/lapl.200810132","article-title":"Multi-wavelength fluorescence lifetime spectroscopy: A new approach to the study of endogenous fluorescence in living cells and tissues","volume":"6","author":"Chorvat","year":"2009","journal-title":"Lasers Phys. Lett."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Lakowicz, J.R. (2006). Principles of Fluorescence Spectroscopy, Kluwer\/Plenum. [3rd ed.].","DOI":"10.1007\/978-0-387-46312-4"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1007\/s10439-011-0495-y","article-title":"Fluorescence lifetime techniques in medical applications","volume":"40","author":"Marcu","year":"2012","journal-title":"Ann. Biomed. Eng."},{"key":"ref_11","unstructured":"(2018, June 04). Lead in Drinking-water. Available online: http:\/\/www.who.int\/water_sanitation_health\/dwq\/chemicals\/lead.pdf."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1016\/j.colsurfa.2004.04.056","article-title":"Homogeneous precipitation of cerium dioxide nanoparticles in alcohol\/water mixed solvents","volume":"242","author":"Chen","year":"2004","journal-title":"Colloids Surfaces A Physicochem. Eng. Asp."},{"key":"ref_13","unstructured":"Cullity, B. (1956). Elements of X-ray Diffraction, Addison-Wesley Publishing Company Inc.. [1st ed.]."},{"key":"ref_14","unstructured":"Pankove, J. (1971). Optical Processes in Semiconductors, Dover Publications Inc.. [1st ed.]."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1109\/LPT.2007.912568","article-title":"A plastic optical fiber sensor for the dual sensing of temperature and oxygen","volume":"20","author":"Chu","year":"2008","journal-title":"IEEE Photonics Technol. Lett."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1016\/j.jphotochem.2010.11.012","article-title":"Spectroscopic studies on pH- and thermally induced conformational changes of bovine serum albumin adsorbed onto gold nanoparticles","volume":"217","author":"Iosin","year":"2011","journal-title":"J. Photochem. Photobiol. 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