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A novel heterostructure of Co3O4/ZnO nanowire array fabricated by photochemical coating method

Tak, Youngjo and Yong, Kijung (2008) A novel heterostructure of Co3O4/ZnO nanowire array fabricated by photochemical coating method. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (1). pp. 74-79.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp077443a?prev...

Abstract

We developed a facile solution-based synthetic route for the fabrication of two different type's of novel Co3O4/ ZnO nanowire heterostructures: tip-coated array type and fully coated horizontal (or colloidal) type. Two-step solution-based methods were used for the fabrication of the Co3O4/ZnO nanowire e heterostructures. First, ZnO nanowires were grown by ammonia solution hydrothermal method. Afterward, Co3O4 was coated on the ZnO nanowires using a photochemical reaction. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed for the observation of the heterostructure morphology. Also, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to confirm the crystallinity and composition of the heterostructures. We found that the morphology of the heterostructures strongly depends on the photochemical reaction parameters such as the concentration of the cobalt ion solution, UV irradiation time, and geometrical alignment of the ZnO nanowires. The possible mechanism for the heterostructure formation was discussed.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nanoelectronics
Material Science > Nanostructured materials
ID Code:432
Deposited By:Farnush Anwar
Deposited On:05 Dec 2008 16:05
Last Modified:05 Dec 2008 16:05

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