Elucidating the structure and chemical state of Co growth on the ZnO(101̄0) surface

Shu Hsuan Su; Ju Hong Lai; Hsin Hsien Chen; Tsung Hsun Lee; Yao Jane Hsu; Rui Long Wang; J. C.A. Huang

doi:10.1021/jp209993m

Elucidating the structure and chemical state of Co growth on the ZnO(101̄0) surface

Shu Hsuan Su, Ju Hong Lai, Hsin Hsien Chen, Tsung Hsun Lee, Yao Jane Hsu, Rui Long Wang, J. C.A. Huang

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

This study elucidates the epitaxial growth structure and chemical state of Co on the ZnO(101̄0) surface by using scanning tunneling microscopy, reflection high-energy electron diffraction, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The well-ordered cobalt oxide (CoO _x)(2 × 1) structure is formed at 0.5 ML Co coverage. Increasing the Co coverage from 0.7 to 1 ML allows for the surface characterization by the Co stripe structure, while the Co metallic clusters are clearly developed above 3 ML Co coverage. Coverage-dependent measurements of the Co chemical state indicate that the initial Co mixed oxidation and metallic state exists at submonolayer and gradually transfers to a metallic Co-dominated state. The results also suggest that the initial growth mode is two-dimensional-like and bridged to three-dimensional at higher Co coverages.

Original language	English
Pages (from-to)	9917-9924
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	18
DOIs	https://doi.org/10.1021/jp209993m
Publication status	Published - 2012 May 10

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp209993m

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title = "Elucidating the structure and chemical state of Co growth on the ZnO(10{\=1}0) surface",

abstract = "This study elucidates the epitaxial growth structure and chemical state of Co on the ZnO(10{\=1}0) surface by using scanning tunneling microscopy, reflection high-energy electron diffraction, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The well-ordered cobalt oxide (CoO x)(2 × 1) structure is formed at 0.5 ML Co coverage. Increasing the Co coverage from 0.7 to 1 ML allows for the surface characterization by the Co stripe structure, while the Co metallic clusters are clearly developed above 3 ML Co coverage. Coverage-dependent measurements of the Co chemical state indicate that the initial Co mixed oxidation and metallic state exists at submonolayer and gradually transfers to a metallic Co-dominated state. The results also suggest that the initial growth mode is two-dimensional-like and bridged to three-dimensional at higher Co coverages.",

author = "Su, {Shu Hsuan} and Lai, {Ju Hong} and Chen, {Hsin Hsien} and Lee, {Tsung Hsun} and Hsu, {Yao Jane} and Wang, {Rui Long} and Huang, {J. C.A.}",

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T1 - Elucidating the structure and chemical state of Co growth on the ZnO(101̄0) surface

AU - Su, Shu Hsuan

AU - Lai, Ju Hong

AU - Chen, Hsin Hsien

AU - Lee, Tsung Hsun

AU - Hsu, Yao Jane

AU - Wang, Rui Long

AU - Huang, J. C.A.

PY - 2012/5/10

Y1 - 2012/5/10

N2 - This study elucidates the epitaxial growth structure and chemical state of Co on the ZnO(101̄0) surface by using scanning tunneling microscopy, reflection high-energy electron diffraction, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The well-ordered cobalt oxide (CoO x)(2 × 1) structure is formed at 0.5 ML Co coverage. Increasing the Co coverage from 0.7 to 1 ML allows for the surface characterization by the Co stripe structure, while the Co metallic clusters are clearly developed above 3 ML Co coverage. Coverage-dependent measurements of the Co chemical state indicate that the initial Co mixed oxidation and metallic state exists at submonolayer and gradually transfers to a metallic Co-dominated state. The results also suggest that the initial growth mode is two-dimensional-like and bridged to three-dimensional at higher Co coverages.

AB - This study elucidates the epitaxial growth structure and chemical state of Co on the ZnO(101̄0) surface by using scanning tunneling microscopy, reflection high-energy electron diffraction, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The well-ordered cobalt oxide (CoO x)(2 × 1) structure is formed at 0.5 ML Co coverage. Increasing the Co coverage from 0.7 to 1 ML allows for the surface characterization by the Co stripe structure, while the Co metallic clusters are clearly developed above 3 ML Co coverage. Coverage-dependent measurements of the Co chemical state indicate that the initial Co mixed oxidation and metallic state exists at submonolayer and gradually transfers to a metallic Co-dominated state. The results also suggest that the initial growth mode is two-dimensional-like and bridged to three-dimensional at higher Co coverages.

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