Document Detail

Growth of dumbbell-like ZnO microcrystals under mild conditions and their photoluminescence properties.
MedLine Citation:
PMID:  17602609     Owner:  NLM     Status:  PubMed-not-MEDLINE    
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.
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
Related Documents :
19060889 - Regular arrays of highly ordered ferroelectric polymer nanostructures for non-volatile ...
16311329 - Encoding electronic properties by synthesis of axial modulation-doped silicon nanowires.
19546499 - Growth of vertical inas nanowires on heterostructured substrates.
18838999 - Cmos-compatible fabrication of room-temperature single-electron devices.
11178069 - Tuning dimensionality by nanowire adsorption on layered materials.
16277469 - Core/multishell nanowire heterostructures as multicolor, high-efficiency light-emitting...
23145729 - The jahn-teller effect in the electron momentum spectroscopy of ammonia.
16375529 - Three-isotope plot of fractionation in photolysis: a perturbation theoretical expression.
22362589 - Ultrastructure of larvae and puparia of the blowfly chrysomya megacephala (diptera: cal...
Publication Detail:
Type:  Journal Article     Date:  2007-06-30
Journal Detail:
Title:  Inorganic chemistry     Volume:  46     ISSN:  0020-1669     ISO Abbreviation:  Inorg Chem     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-07-16     Completed Date:  2007-08-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0366543     Medline TA:  Inorg Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6204-10     Citation Subset:  -    
National Laboratory of Superhard Materials, Jilin University, Changchun, 130012, P. R. China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Precise size control and synchronized synthesis of six colors of CdSe quantum dots in a slow-increas...
Next Document:  Highly uniform and monodisperse beta-NaYF(4):Ln(3+) (Ln = Eu, Tb, Yb/Er, and Yb/Tm) hexagonal microp...