Ultra-Large Unilamellar Nanosheets Efficiently Exfoliated from (Y0.95Eu0.05)2(OH)5NO3·nH2O and their Self-Assembly into Oriented Oxide Film with Enhanced Photoluminescence Properties

Qi Zhu; J.G. Li; Xiao Dong Li; Xu Dong Sun

doi:10.4028/www.scientific.net/KEM.602-603.1017

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The Effect of Post-Conventional Thermal Annealing Process on the Photoluminescence Characteristics of Si⁺-Implanted SiO₂ Thin Films
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Ultra-Large Unilamellar Nanosheets Efficiently Exfoliated from (Y_0.95Eu_0.05)₂(OH)₅NO₃·nH₂O and their Self-Assembly into Oriented Oxide Film with Enhanced Photoluminescence Properties
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Ultra-Large Unilamellar Nanosheets Efficiently...

Ultra-Large Unilamellar Nanosheets Efficiently Exfoliated from (Y_0.95Eu_0.05)₂(OH)₅NO₃·nH₂O and their Self-Assembly into Oriented Oxide Film with Enhanced Photoluminescence Properties

Abstract:

Two dimensional nanophosphors of high quality play an important role in the miniaturization and intelligentization of opto-electronic components. In this present work, ultra-large (30μm) single crystals of (Y_0.95Eu_0.05)₂(OH)₅NO₃·nH₂O layered rare earth hydroxide (LRH) with a hexagonal shape have been synthisized via autoclaving the rare-earth nitrate/NH₄OH reaction system in the presence of ammonium nitrate (NH₄NO₃). The nitrate ions, existing in the interlayer gallery of layered rare earth hydroxide, exhibit facile exchanges with oleate anions by hydrothermal anion exchange. Furthermore, the interlayer distance can thus be expanded from ~0.9 nm for the pristine LRHs to ~3.60 nm for the intercalated ones, which are then efficiently delaminated into unilamellar nanosheets with a lateral size of 10μm and a thickness of ~1.50 nm. The obtained nanosheets are single crystaline. Highly [11 oriented, dense (Y_0.95Eu_0.05)₂O₃ phosphor films with excellent optical transparency and a greatly enhanced luminescence intensity have been constructed via self-assembly of ultra-large unilamellar LRH nanosheets, followed by proper annealing.

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Periodical:

Key Engineering Materials (Volumes 602-603)

Pages:

1017-1020

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.1017

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Online since:

March 2014

Authors:

Qi Zhu*, J.G. Li, Xiao Dong Li, Xu Dong Sun

Keywords:

Exfoliation, Layered Rare Earth Hydroxide, Oriented Film, Ultra-Large Unilamellar Nanosheets

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References

[1] F. Gándara, J. Perles, N. Snejko, M. Iglesias, B. Gómez-Lor, E. Gutiérrez-Puebla, M. A. Monge, Layered rare-earth hydroxides: a calss of pillary crystalline compounds for intercalation chemistry, Angew. Chem. Int. Ed. 45 (2006) 7998-8001.

DOI: 10.1002/anie.200602502

Google Scholar

[2] F. X. Geng, Y. Matsushita, R. Ma, H. Xin, M. Tanaka, F. Izumi, N. Iyi, T. Sasaki, General synthesis and structural evolution of a layered family of Ln8(OH)20Cl4·nH2O (Ln=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y), J. Am. Chem. Soc. 130 (2008).

DOI: 10.1021/ja807050e

Google Scholar

[3] L. F. Hu, R. Ma, T. C. Ozawa, T. Sasaki, Exfoliation of layered europium hydroxide into unilamellar nanosheets, Chem. Asian J. 5 (2010) 248-251.

DOI: 10.1002/asia.200900475

Google Scholar

[4] Q. Zhu, J. -G. Li, C. Y. Zhi, X. D. Li, X. D. Sun, Y. Sakka, D. Golberg, Y. Bando, Layered rare-earth hydroxides (LRHs) of (Y1-xEux)2(OH)5NO3·nH2O (x=0-1): structural variations by Eu3+ doping, phase conversion to oxides, and the correlation of photoluminescence behaviors, Chem. Mater. 22 (2010).

DOI: 10.1021/cm1011586

Google Scholar

[5] Q. Zhu, J. -G. Li, C. Y. Zhi, R. Ma, T. Sasaki, J. X. Xu, C. H. Liu, X. D. Li, X. D. Sun, Y. Sakka, Nanometer-thin layered hydroxide platelets of (Y0. 95Eu0. 05)2(OH)5NO3·xH2O: exfoliation-free synthesis, self-assembly, and the derivation of dense oriented oxide films of high transparency and greatly enhanced luminescence, J. Mater. Chem. 21 (2011).

DOI: 10.1039/c1jm00048a

Google Scholar

[6] Q. Zhu, J. -G. Li, R. Ma, T. Sasaki, X. Yang, X. D. Li, X. D. Sun, Y. Sakka, Well-defined crystallites autoclaved from the nitrate/NH4OH reaction systemas the precursor for (Y, Eu)2O3 red phosphor: Crystallization mechanism, phase and morphology control, and luminescent property, J. Solid State Chem. 192 (2012).

DOI: 10.1016/j.jssc.2012.04.015

Google Scholar