dc.creatorROJAS-HERNANDEZ, ROCIO E.
dc.creatorRUBIO-MARCOS, FERNANDO
dc.creatorGORNI, GIULIO
dc.creatorMARINI, CARLO
dc.creatorDANILSON, MATI
dc.creatorPASCUAL, LAURA
dc.creatorICHIKAWA, RODRIGO U.
dc.creatorHUSSAINOVA, IRINA
dc.creatorFERNANDEZ, JOSE F.
dc.date2021
dc.date2021-07-19T19:34:00Z
dc.date2021-07-19T19:34:00Z
dc.date.accessioned2023-09-28T14:18:35Z
dc.date.available2023-09-28T14:18:35Z
dc.identifier2050-7526
dc.identifierhttp://repositorio.ipen.br/handle/123456789/32025
dc.identifier2
dc.identifier9
dc.identifier10.1039/d0tc04752j
dc.identifier82.48
dc.identifier92.00
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9002248
dc.descriptionDevelopment of new near infrared luminescent (NIR) emitters improves our understanding of their fundamental structure???property relationships. The ability to use efficient energy transfer to convert ultraviolet or visible light photons to enhance the NIR emission has attracted a great deal of attention in down-conversion applications. Taking advantage of the sol???gel impregnation process and growth of materials along a support or template, core???shell structured nanofibers of ZnAl2O4 ??? based ceramic doped with cerium and neodymium were synthesized with the help of an elaborate facile and cost-efficient strategy. The color-tunable emissions make this material a suitable host for a wide range of applications, e.g., bio-imaging, security markers, imaging devices, optical coatings, and solar cells. This research correlates the defects and the remarkable optical properties of the developed structures. Specified conditions of sol???gel processing combined with the incorporation of rare-earth elements in various concentrations provide the possibility of tuning the ratio between Ce3+ and Ce4+ in the nanofibers with an average diameter of 50 nm and, therefore, their functional response. It is important to clarify the role of trivalent and tetravalent cerium cations in the modulation of NIR emission to establish the luminescence mechanism. The NIR emitter luminescent compound ZnAl2O4:Nd,Ce, which adopts a spinel-type structure, is studied using the X-ray absorption near-edge structure technique. For the first time, this study reveals the energy transfer from Ce3+ to Nd3+ and the enhancement of the NIR emission due to the presence of Ce4+ in the ZnAl2O4:Nd,Ce spinel compound. Cytotoxicity analyses suggest the viability of the synthesized nanofibers, which opens new avenues in bio-imaging applications.
dc.format657-670
dc.relationJournal of Materials Chemistry C
dc.rightsopenAccess
dc.subjectnanofibers
dc.subjectnear infrared radiation
dc.subjectzinc
dc.subjectcerium
dc.subjectneodymium
dc.titleEnhancing NIR emission in ZnAl2O4:Nd,Ce nanofibers by co-doping with Ce and Nd
dc.typeArtigo de peri??dico
dc.coverageI


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