Journal ArticleDOI
Optically active uniform potassium and lithium rare earth fluoride nanocrystals derived from metal trifluroacetate precursors
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TLDR
This paper reports the first systematical synthesis of near-monodisperse potassium and lithium rare earth (RE) fluoride (K(Li)REF4) nanocrystals with diverse shapes via co-thermolysis of Li(CF 3COO) or K(CF3COO), and the ease of doping of these as-synthesized host nanocry crystals for designed luminescence properties is assessed.Abstract:
This paper reports the first systematical synthesis of near-monodisperse potassium and lithium rare earth (RE) fluoride (K(Li)REF4) nanocrystals with diverse shapes (cubic KLaF4 and KCeF4 wormlike nanowires, nanocubes and nanopolyhedra; cubic LiREF4 (RE = Pr to Gd, Y) nanopolyhedra; tetragonal LiREF4 (RE = Tb to Lu, Y) rhombic nanoplates) via co-thermolysis of Li(CF3COO) or K(CF3COO) and RE(CF3COO)3 in a hot oleic acid/oleylamine/1-octadecene solution. The effects of the solvent composition, reaction temperature and time on the crystal phase purity, shape, and size of the as-prepared nanocrystals have been investigated in detail. The formation of monodisperse nanocrystals is found to strongly depend upon the nature of both alkali metals from Li to K, and the rare earth series from La to Lu and Y. Based on the series of experimental results, a controlled-growth mechanism has also been proposed. In addition, the ease of doping of these as-synthesized host nanocrystals for designed luminescence properties is assessed. For example, monodisperse and single-crystalline Eu3+ doped KGdF4, Yb3+ and Er3+ co-doped LiYF4 nanocrystals redispersed in cyclohexane exhibit visible room-temperature red and green emissions under ultraviolet (UV) excitation and near infrared (NIR) 980 nm laser excitation, respectively.read more
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Upconversion luminescent materials: advances and applications.
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Upconversion nanophosphors for small-animal imaging
Jing Zhou,Zhuang Liu,Fuyou Li +2 more
TL;DR: In this critical review, recent reports regarding the synthesis of water-soluble UCNPs and their surface modification and bioconjugation chemistry are summarized and the applications ofUCNPs for small-animal imaging, including tumor-targeted imaging, lymphatic imaging, vascular imaging and cell tracking are reviewed in detail.
Journal ArticleDOI
Recent Progress in Rare Earth Micro/Nanocrystals: Soft Chemical Synthesis, Luminescent Properties, and Biomedical Applications
TL;DR: Synthesis, Luminescent Properties, and Biomedical Applications Shili Gai,‡ Chunxia Li,† Piaoping Yang,*,‡ and Jun Lin*,† † state Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.
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Lanthanide Nanoparticles: From Design toward Bioimaging and Therapy
Hailiang Dong,Shuo-Ren Du,Xiao-Yu Zheng,Guang-Ming Lyu,Ling-Dong Sun,Lin-Dong Li,Pei-Zhi Zhang,Chao Zhang,Chun-Hua Yan +8 more
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Energy transfer in lanthanide upconversion studies for extended optical applications
TL;DR: A fundamental understanding of energy transfer in lanthanide-supported photon upconversion is presented and the emerging progress in excitation selection based on the energy transfer within lanthanides ions or activation from antennae is introduced.
References
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Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites
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Journal ArticleDOI
Shape control of CdSe nanocrystals
Xiaogang Peng,Liberato Manna,Liberato Manna,Liberato Manna,Weidong Yang,Weidong Yang,Weidong Yang,Juanita N. Wickham,Juanita N. Wickham,Juanita N. Wickham,Erik C. Scher,Erik C. Scher,Erik C. Scher,Andreas Kadavanich,Andreas Kadavanich,Andreas Kadavanich,A. P. Alivisatos,A. P. Alivisatos,A. P. Alivisatos +18 more
TL;DR: Control of the growth kinetics of the II–VI semiconductor cadmium selenide can be used to vary the shapes of the resulting particles from a nearly spherical morphology to a rod-like one, with aspect ratios as large as ten to one.
Journal ArticleDOI
Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
TL;DR: In this article, solution phase syntheses and size-selective separation methods to prepare semiconductor and metal nanocrystals, tunable in size from ∼1 to 20 nm and monodisperse to ≤ 5%, are presented.
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