Zeng, Xiaoyan and Yuan, Junlin and Zhang, Lide (2008) Synthesis and photoluminescent properties of rare earth doped ZnO hierarchical microspheres. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (10). pp. 3503-3508.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp0768118
Hierarchical ZnO microspheres constructed by mesoporous quasi-single-crystalline ZnO nanosheets were fabricated by pyrolysis of the microspheres of layered hydroxide zinc carbonate, Zn-5(CO3)(2)(OH)(6), which was the hydrothermal precipitate of zinc nitrate and urea. A growth mechanism of Zn-5(CO3)(2)(OH)(6) microspheres was proposed. During the pyrolysis process, single-crystalline Zn-5(CO3)(2)(OH)(6) nanosheets were transformed into mesoporous quasi-single-crystalline ZnO nanosheets. When the samples were doped with trivalent rare earth ion, RE3+ (RE = Pr, Sm, Tb, Ho, Tm), no ZnO --> RE3+ energy transfer was observed. However, the ZnO:Eu3+ sample showed efficient Eu3+ emissions under UV photon excitation (lambda < 365 nm), which is attributed to energy transfer from photon-generated electron-hole pairs to Eu3+ ions in the surface layer of the ZnO nanosheet.
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
Physical Science > Photonics
|Deposited By:||Farnush Anwar|
|Deposited On:||16 Dec 2008 14:08|
|Last Modified:||16 Dec 2008 14:08|
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