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Title: Lanthanide-doped NaxScF3+ x nanocrystals : crystal structure evolution and multicolor tuning
Authors: Capobianco, John A.
Teng, Xue
Zhu, Yihan
Wei, Wei
Wang, Shuchao
Huang, Jingfeng
Naccache, Rafik
Hu, Wenbo
Han, Yu
Zhang, Qichun
Fan, Qu-Li
Huang, Wei
Huang, Ling
Tok, Alfred Iing Yoong
Issue Date: 2012
Source: Teng, X., Zhu, Y., Wei, W., Wang, S., Huang, J., Naccache, R., et al. (2012). Lanthanide-Doped NaxScF3+x Nanocrystals: Crystal Structure Evolution and Multicolor Tuning . Journal of the American Chemical Society, 134(20), 8340-8343.
Series/Report no.: Journal of the American chemical society
Abstract: Rare-earth-based nanomaterials have recently drawn considerable attention because of their unique energy upconversion (UC) capabilities. However, studies of Sc3+-based nanomaterials are still absent. Herein we report the synthesis and fine control of NaxScF3+x nanocrystals by tuning of the ratio of oleic acid (OA, polar surfactant) to 1-octadecene (OD, nonpolar solvent). When the OA:OD ratio was increased from low (3:17) to high (3:7), the nanocrystals changed from pure monoclinic phase (Na3ScF6) to pure hexagonal phase (NaScF4) via a transition stage at an intermediate OA:OD ratio (3:9) where a mixture of nanocrystals in monoclinic and hexagonal phases was obtained and the coexistence of the two phases inside individual nanocrystals was also observed. More significantly, because of the small radius of Sc3+, NaxScF3+x:Yb/Er nanocrystals show different UC emission from that of NaYF4:Yb/Er nanocrystals, which broadens the applications of rare-earth-based nanomaterials ranging from optical communications to disease diagnosis.
DOI: 10.1021/ja3016236
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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