| Growth of dumbbell-like ZnO microcrystals under mild conditions and their photoluminescence properties. | |
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MedLine Citation:
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PMID: 17602609 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Large-scale uniform dumbbell-like ZnO microcrystals were successfully synthesized via a facile solution method under mild conditions. The as-prepared dumbbells, with lengths of 3.5-5.4 microm and diameters of 1.3-1.8 microm, possess a single-crystal hexagonal structure and grow along the [0001] direction. The influence of the reactant concentration on the size and shapes of the ZnO samples had been studied, and the results revealed that the reactant concentration plays a crucial role in determining final morphologies of the samples. Moreover, the evolution process of the dumbbell-like ZnO microcrystals was viewed by field-emission scanning electron microscopy (FE-SEM) characterization, and a possible formation mechanism was proposed. In addition, optical properties of the ZnO samples prepared at different reaction times were also investigated by photoluminescence (PL) spectroscopy. The room-temperature PL spectrum of the dumbbell-like ZnO microcrystals shows a strong UV emission peak. The UV emission is further identified to originate from the radiative free-exciton recombination by the temperature-dependent PL. |
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Authors:
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Qingjiang Yu; Cuiling Yu; Haibin Yang; Wuyou Fu; Lianxia Chang; Jing Xu; Ronghui Wei; Hongdong Li; Hongyang Zhu; Minghui Li; Guangtian Zou; Guorui Wang; Changlu Shao; Yichun Liu |
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Publication Detail:
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Type: Journal Article Date: 2007-06-30 |
Journal Detail:
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Title: Inorganic chemistry Volume: 46 ISSN: 0020-1669 ISO Abbreviation: Inorg Chem Publication Date: 2007 Jul |
Date Detail:
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Created Date: 2007-07-16 Completed Date: 2007-08-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0366543 Medline TA: Inorg Chem Country: United States |
Other Details:
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Languages: eng Pagination: 6204-10 Citation Subset: - |
Affiliation:
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National Laboratory of Superhard Materials, Jilin University, Changchun, 130012, P. R. China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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