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dc.contributor.authorWang, Feng
dc.contributor.authorDeng, Renren
dc.contributor.authorWang, Juan
dc.contributor.authorWang, Qingxiao
dc.contributor.authorHan, Yu
dc.contributor.authorZhu, Haomiao
dc.contributor.authorChen, Xueyuan
dc.contributor.authorLiu, Xiaogang
dc.date.accessioned2015-08-03T09:33:42Z
dc.date.available2015-08-03T09:33:42Z
dc.date.issued2011-10-23
dc.identifier.issn14761122
dc.identifier.pmid22019945
dc.identifier.doi10.1038/nmat3149
dc.identifier.urihttp://hdl.handle.net/10754/561902
dc.description.abstractPhoton upconversion is promising for applications such as biological imaging, data storage or solar cells. Here, we have investigated upconversion processes in a broad range of gadolinium-based nanoparticles of varying composition. We show that by rational design of a core-shell structure with a set of lanthanide ions incorporated into separated layers at precisely defined concentrations, efficient upconversion emission can be realized through gadolinium sublattice-mediated energy migration for a wide range of lanthanide activators without long-lived intermediary energy states. Furthermore, the use of the core-shell structure allows the elimination of deleterious cross-relaxation. This effect enables fine-tuning of upconversion emission through trapping of the migrating energy by the activators. Indeed, the findings described here suggest a general approach to constructing a new class of luminescent materials with tunable upconversion emissions by controlled manipulation of energy transfer within a nanoscopic region. © 2011 Macmillan Publishers Limited. All rights reserved.
dc.description.sponsorshipThe bulk of the work was supported by the Singapore Ministry of Education (No. MOE2010T2-1-083), the Singapore-MIT Alliance, and the Agency for Science, Technology and Research (No. IMRE/11-1C0110). Y.H. is grateful to KAUST Global Collaborative Research for the Academic Excellence Alliance (AEA) fund. H.Z. and X. C. acknowledge the financial support from the NSFC (Nos. 10974200 and 51002151) and the 863 programs of MOST (Nos. 2009AA03Z430 and 2011AA03A407). We thank T. Nguyen, Y. Liu and L. Tan for their help in sample characterization.
dc.publisherSpringer Nature
dc.titleTuning upconversion through energy migration in core-shell nanoparticles
dc.typeArticle
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Lab
dc.contributor.departmentCore Labs
dc.contributor.departmentNanostructured Functional Materials (NFM) laboratory
dc.identifier.journalNature Materials
dc.contributor.institutionDepartment of Chemistry, National University of Singapore, 117543, Singapore, Singapore
dc.contributor.institutionKey Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
dc.contributor.institutionInstitute of Materials Research and Engineering, 3 Research Link, 117602, Singapore, Singapore
dc.contributor.institutionSingapore-MIT Alliance, 4 Engineering Drive 3, 117576, Singapore, Singapore
kaust.personWang, Qingxiao
kaust.personHan, Yu
kaust.grant.number10974200
kaust.grant.number51002151
kaust.acknowledged.supportUnitKAUST Global Collaborative Research for the Academic Excellence Alliance (AEA) fund
dc.date.published-online2011-10-23
dc.date.published-print2011-12


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