Catalytic growth of CdTe nanowires by closed space sublimation method

Gwangseok Yang; Younghun Jung; Seungju Chun; Donghwan Kim; Jihyun Kim

doi:10.1016/j.tsf.2013.03.068

Catalytic growth of CdTe nanowires by closed space sublimation method

Gwangseok Yang, Younghun Jung, Seungju Chun, Donghwan Kim, Jihyun Kim

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

13 Citations (Scopus)

Abstract

CdTe nano-/micro-structures with various morphologies were grown by using the closed space sublimation (CSS) method on a sapphire substrate by Au-catalyzed vapor-liquid-solid (VLS) mechanism. Length, diameter, and morphology of the CdTe nano-/micro-structures depended on the growth time and temperature gradient between the substrate and powdered CdTe source. Scanning electron microscopy images showed that an Au catalyst droplet existed at the tips of CdTe nanowires, which confirms that CdTe nanowires were grown by an Au-catalyzed VLS mechanism. Also, we observed that the two-dimensional CdTe film layer initially formed before the growth of the CdTe nano-/micro-wires. The optical and structural properties of CdTe nano-/micro-structures were characterized by X-ray diffraction technique and micro-Raman spectroscopy. Our study demonstrates that diverse CdTe nano-/micro-structures can be fabricated by using Au-catalyzed VLS growth process in a simple CSS chamber by controlling the temperature gradient and growth time.

Original language	English
Pages (from-to)	375-378
Number of pages	4
Journal	Thin Solid Films
Volume	546
DOIs	https://doi.org/10.1016/j.tsf.2013.03.068
Publication status	Published - 2013 Nov 1

Keywords

CdTe
Closed space sublimation method
Nanostructures

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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title = "Catalytic growth of CdTe nanowires by closed space sublimation method",

abstract = "CdTe nano-/micro-structures with various morphologies were grown by using the closed space sublimation (CSS) method on a sapphire substrate by Au-catalyzed vapor-liquid-solid (VLS) mechanism. Length, diameter, and morphology of the CdTe nano-/micro-structures depended on the growth time and temperature gradient between the substrate and powdered CdTe source. Scanning electron microscopy images showed that an Au catalyst droplet existed at the tips of CdTe nanowires, which confirms that CdTe nanowires were grown by an Au-catalyzed VLS mechanism. Also, we observed that the two-dimensional CdTe film layer initially formed before the growth of the CdTe nano-/micro-wires. The optical and structural properties of CdTe nano-/micro-structures were characterized by X-ray diffraction technique and micro-Raman spectroscopy. Our study demonstrates that diverse CdTe nano-/micro-structures can be fabricated by using Au-catalyzed VLS growth process in a simple CSS chamber by controlling the temperature gradient and growth time.",

keywords = "CdTe, Closed space sublimation method, Nanostructures",

author = "Gwangseok Yang and Younghun Jung and Seungju Chun and Donghwan Kim and Jihyun Kim",

note = "Funding Information: This research was supported by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (Grant No. 20104010100640 ), a Korea University Grant and the Center for Inorganic Photovoltaic Materials (No. 2012-0001171 ) grant funded by the Korea government (MEST) . Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2013",

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doi = "10.1016/j.tsf.2013.03.068",

language = "English",

volume = "546",

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journal = "Thin Solid Films",

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AU - Yang, Gwangseok

AU - Jung, Younghun

AU - Chun, Seungju

AU - Kim, Donghwan

AU - Kim, Jihyun

N1 - Funding Information: This research was supported by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (Grant No. 20104010100640 ), a Korea University Grant and the Center for Inorganic Photovoltaic Materials (No. 2012-0001171 ) grant funded by the Korea government (MEST) . Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2013/11/1

Y1 - 2013/11/1

N2 - CdTe nano-/micro-structures with various morphologies were grown by using the closed space sublimation (CSS) method on a sapphire substrate by Au-catalyzed vapor-liquid-solid (VLS) mechanism. Length, diameter, and morphology of the CdTe nano-/micro-structures depended on the growth time and temperature gradient between the substrate and powdered CdTe source. Scanning electron microscopy images showed that an Au catalyst droplet existed at the tips of CdTe nanowires, which confirms that CdTe nanowires were grown by an Au-catalyzed VLS mechanism. Also, we observed that the two-dimensional CdTe film layer initially formed before the growth of the CdTe nano-/micro-wires. The optical and structural properties of CdTe nano-/micro-structures were characterized by X-ray diffraction technique and micro-Raman spectroscopy. Our study demonstrates that diverse CdTe nano-/micro-structures can be fabricated by using Au-catalyzed VLS growth process in a simple CSS chamber by controlling the temperature gradient and growth time.

AB - CdTe nano-/micro-structures with various morphologies were grown by using the closed space sublimation (CSS) method on a sapphire substrate by Au-catalyzed vapor-liquid-solid (VLS) mechanism. Length, diameter, and morphology of the CdTe nano-/micro-structures depended on the growth time and temperature gradient between the substrate and powdered CdTe source. Scanning electron microscopy images showed that an Au catalyst droplet existed at the tips of CdTe nanowires, which confirms that CdTe nanowires were grown by an Au-catalyzed VLS mechanism. Also, we observed that the two-dimensional CdTe film layer initially formed before the growth of the CdTe nano-/micro-wires. The optical and structural properties of CdTe nano-/micro-structures were characterized by X-ray diffraction technique and micro-Raman spectroscopy. Our study demonstrates that diverse CdTe nano-/micro-structures can be fabricated by using Au-catalyzed VLS growth process in a simple CSS chamber by controlling the temperature gradient and growth time.

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KW - Nanostructures

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Catalytic growth of CdTe nanowires by closed space sublimation method

Abstract

Keywords

ASJC Scopus subject areas

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