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Received July 14, 2006
Accepted March 10, 2007
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Growth of ZnO nanoneedles on silicon substrate by cyclic feeding chemical vapor deposition: Structural and optical properties
School of Semiconductor and Chemical Engineering, and Nanomaterials Processing Research Centre, Chonbuk National University, Jeonju 561-756, Korea
Korean Journal of Chemical Engineering, November 2007, 24(6), 1084-1088(5), 10.1007/s11814-007-0125-4
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Abstract
Well-crystallized ZnO nanoneedles were grown on Au-coated Si(100) substrate by cyclic feeding chemical vapor deposition (CFCVD) process using diethyl zinc and oxygen as precursors for zinc and oxygen, respectively. Morphological investigations revealed that the as-grown nanoneedles exhibited sharpened tips and wider bases, having the typical diameters at their bases and tips, 60±10 nm and 20±10 nm, respectively. Detailed structural characterizations confirmed that the as-grown products were single crystalline with a wurtzite hexagonal phase and were grown preferentially along the [0001] direction. The room-temperature photoluminescence (PL) spectrum showed a strong and sharp UV emission at 378 nm with a very weak, suppressed and broad green emission at 520 nm, substantiating good optical properties for the as-grown ZnO nanoneedles.
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Li YB, Bando Y, Golberg D, Appl. Phys. Lett., 84, 3603 (2004)
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Vanheusden K, Seager CH, Warren WL, Tallant DR, Voigt JA, J. Appl. Phys., 79, 7983 (1996)
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