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Cho, Seungho
Metal Oxide DEsign Laboratory (MODEL)
Research Interests
  • Metal Oxide Crystal Growth

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Exposed Crystal Face Controlled Synthesis of 3D ZnO Superstructures

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Title
Exposed Crystal Face Controlled Synthesis of 3D ZnO Superstructures
Other Titles
Exposed Crystal Face Controlled Synthesis of 3D ZnO Superstructures
Author
Cho, SeunghoJang, Ji-WookLee, Jae SungLee, Kun-Hong
Issue Date
2010-09
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.26, no.17, pp.14255 - 14262
Abstract
We report a method for synthesizing exposed crystal face controlled 3D ZnO superstructures under mild conditions (at room temperature or 90 C under 1 atm) without organic additives. The exposed crystal faces of the building blocks of the 3D structures were controlled by varying the reactant concentrations and the reaction temperatures. On the basis of the experimental results, we speculated a possible mechanism for the formation of the four distinct 3D ZnO superstructures (structures I, II, III, and IV) under the different growth conditions. The optical properties of the 3D ZnO superstructures were probed by UV vis diffuse reflectance spectroscopy. The spectra were shifted depending on the dimensions and sizes of the building blocks of the 3D superstructures. The photocatalytic activities of the 3D superstructures varied according to the exposed crystal faces, which could be controlled by this method (structure 1 > structure IV > structure III > structure II)
URI
https://scholarworks.unist.ac.kr/handle/201301/12848
URL
http://pubs.acs.org/doi/abs/10.1021/la102126m
DOI
10.1021/la102126m
ISSN
0743-7463
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