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dc.contributor.authorWang, Feng
dc.contributor.authorHan, Yu
dc.contributor.authorLim, Chinseong
dc.contributor.authorLu, Yunhao
dc.contributor.authorWang, Juan
dc.contributor.authorXu, Jun
dc.contributor.authorChen, Hongyu
dc.contributor.authorZhang, Chun
dc.contributor.authorHong, Minghui
dc.contributor.authorLiu, Xiaogang
dc.date.accessioned2015-08-02T09:11:42Z
dc.date.available2015-08-02T09:11:42Z
dc.date.issued2010-02-25
dc.identifier.citationWang, F., Han, Y., Lim, C. S., Lu, Y., Wang, J., Xu, J., … Liu, X. (2010). Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping. Nature, 463(7284), 1061–1065. doi:10.1038/nature08777
dc.identifier.issn00280836
dc.identifier.pmid20182508
dc.identifier.doi10.1038/nature08777
dc.identifier.urihttp://hdl.handle.net/10754/561452
dc.description.abstractDoping is a widely applied technological process in materials science that involves incorporating atoms or ions of appropriate elements into host lattices to yield hybrid materials with desirable properties and functions. For nanocrystalline materials, doping is of fundamental importance in stabilizing a specific crystallographic phase, modifying electronic properties, modulating magnetism as well as tuning emission properties. Here we describe a material system in which doping influences the growth process to give simultaneous control over the crystallographic phase, size and optical emission properties of the resulting nanocrystals. We show that NaYF 4 nanocrystals can be rationally tuned in size (down to ten nanometres), phase (cubic or hexagonal) and upconversion emission colour (green to blue) through use of trivalent lanthanide dopant ions introduced at precisely defined concentrations. We use first-principles calculations to confirm that the influence of lanthanide doping on crystal phase and size arises from a strong dependence on the size and dipole polarizability of the substitutional dopant ion. Our results suggest that the doping-induced structural and size transition, demonstrated here in NaYF 4 upconversion nanocrystals, could be extended to other lanthanide-doped nanocrystal systems for applications ranging from luminescent biological labels to volumetric three-dimensional displays. © 2010 Macmillan Publishers Limited. All rights reserved.
dc.description.sponsorshipWe thank G. A. Ozin, X. Chen, F. Stellacci, C. Yan, Y. Xia, L. Cademartiri, T. Nann, Y. Li and Y. C. Cao for discussions. This study was supported in part by the National University of Singapore (NUS), the Ministry of Education of Singapore, the Singapore-MIT Alliance, and the Agency for Science, Technology and Research (A*STAR). X. L. is grateful to the NUS for a Young Investigator Award.
dc.publisherSpringer Nature
dc.titleSimultaneous phase and size control of upconversion nanocrystals through lanthanide doping
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentNanostructured Functional Materials (NFM) laboratory
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalNature
dc.contributor.institutionDepartment of Chemistry, National University of Singapore, 117543, Singapore, Singapore
dc.contributor.institutionOptical Materials and Systems Division, Data Storage Institute, A STAR, 117608, Singapore, Singapore
dc.contributor.institutionDepartment of Physics, National University of Singapore, 117543, Singapore, Singapore
dc.contributor.institutionDivision of Chemistry and Biological Chemistry, Nanyang Technological University, 637371 Singapore, Singapore
dc.contributor.institutionDepartment of Electrical and Computer Engineering, National University of Singapore, 117543 Singapore, Singapore
kaust.personHan, Yu
dc.date.published-online2010-02-25
dc.date.published-print2010-02


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