Star-shaped ZnO nanostructures on silicon by cyclic feeding chemical vapor deposition

A. Umar; S. Lee; Y. S. Lee; K. S. Nahm; Y. B. Hahn

doi:10.1016/j.jcrysgro.2005.02.007

Star-shaped ZnO nanostructures on silicon by cyclic feeding chemical vapor deposition

A. Umar, S. Lee, Y. S. Lee, K. S. Nahm, Y. B. Hahn

Department of Chemistry

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

86 Citations (Scopus)

Abstract

Star-shaped ZnO nanostructures were grown over Au-coated Si (1 0 0) substrate by a cyclic feeding chemical vapor deposition method. Transmission electron microscopy image and selected area electron diffraction pattern showed that these nanostructures were single crystalline with wurtzite hexagonal structure and preferentially oriented in the c-axis direction. Photoluminescence (PL) spectra of the as-grown structures measured at room temperature showed a suppressed UV emission at 380 nm and a strong and broad green emission at 520 nm, but showed reversibly a drastic change in the PL intensity when the samples were annealed in an oxygen atmosphere at 500 °C.

Original language	English
Pages (from-to)	479-484
Number of pages	6
Journal	Journal of Crystal Growth
Volume	277
Issue number	1-4
DOIs	https://doi.org/10.1016/j.jcrysgro.2005.02.007
Publication status	Published - 15 Apr 2005

Keywords

A1. High resolution transmission electron microscopy
A1. Photoluminescence
A1. Star-shaped nanostructures
A3. Cyclic feeding CVD
B1. ZnO
B2. Semiconducting II-VI materials

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10.1016/j.jcrysgro.2005.02.007

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abstract = "Star-shaped ZnO nanostructures were grown over Au-coated Si (1 0 0) substrate by a cyclic feeding chemical vapor deposition method. Transmission electron microscopy image and selected area electron diffraction pattern showed that these nanostructures were single crystalline with wurtzite hexagonal structure and preferentially oriented in the c-axis direction. Photoluminescence (PL) spectra of the as-grown structures measured at room temperature showed a suppressed UV emission at 380 nm and a strong and broad green emission at 520 nm, but showed reversibly a drastic change in the PL intensity when the samples were annealed in an oxygen atmosphere at 500 °C.",

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T1 - Star-shaped ZnO nanostructures on silicon by cyclic feeding chemical vapor deposition

AU - Umar, A.

AU - Lee, S.

AU - Lee, Y. S.

AU - Nahm, K. S.

AU - Hahn, Y. B.

PY - 2005/4/15

Y1 - 2005/4/15

N2 - Star-shaped ZnO nanostructures were grown over Au-coated Si (1 0 0) substrate by a cyclic feeding chemical vapor deposition method. Transmission electron microscopy image and selected area electron diffraction pattern showed that these nanostructures were single crystalline with wurtzite hexagonal structure and preferentially oriented in the c-axis direction. Photoluminescence (PL) spectra of the as-grown structures measured at room temperature showed a suppressed UV emission at 380 nm and a strong and broad green emission at 520 nm, but showed reversibly a drastic change in the PL intensity when the samples were annealed in an oxygen atmosphere at 500 °C.

AB - Star-shaped ZnO nanostructures were grown over Au-coated Si (1 0 0) substrate by a cyclic feeding chemical vapor deposition method. Transmission electron microscopy image and selected area electron diffraction pattern showed that these nanostructures were single crystalline with wurtzite hexagonal structure and preferentially oriented in the c-axis direction. Photoluminescence (PL) spectra of the as-grown structures measured at room temperature showed a suppressed UV emission at 380 nm and a strong and broad green emission at 520 nm, but showed reversibly a drastic change in the PL intensity when the samples were annealed in an oxygen atmosphere at 500 °C.

KW - A1. High resolution transmission electron microscopy

KW - A1. Photoluminescence

KW - A1. Star-shaped nanostructures

KW - A3. Cyclic feeding CVD

KW - B1. ZnO

KW - B2. Semiconducting II-VI materials

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M3 - Article

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SP - 479

EP - 484

JO - Journal of Crystal Growth

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IS - 1-4

ER -

Star-shaped ZnO nanostructures on silicon by cyclic feeding chemical vapor deposition

Abstract

Keywords

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