In situ growth of aligned CdS nanowire arrays on Cd foil and their optical and electron field emission properties

Journal Article · Tue Jul 01 00:00:00 EDT 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2952013· OSTI ID:21137389

Qian, G X; Hung, T F; Chu, Paul K ^[1]; Huo, K F ^[1]; Fu, J J ^[2]

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1. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)
2. Hubei Province Key Laboratory of Refractories and Ceramics Ministry, Province Jointly-Constructed Cultivation Base for State Key Laboratory, College of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081 (China)

Aligned CdS nanowire arrays have been fabricated directly on a Cd foil via a simple solvothermal method. The metal Cd foil serves as both the Cd source and substrate during fabrication of the aligned CdS nanowire arrays. The morphology, structure, and composition of the samples are characterized by x-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, energy-dispersive x-ray spectroscopy, and selected-area electron diffraction, and the results reveal the formation of aligned single-crystalline CdS nanowires with uniform diameters of 20-40 nm. The photoluminescence and Raman spectra disclose the optical properties of the products and the possible growth mechanism is suggested. The electron field emission properties are also investigated and analyzed. The screening effect is observed to play a vital role in the electron field emission properties due to the coalescent ends of the nanowires. The simple synthesis methodology in conjunction with the good field emission and optical properties makes the materials both scientifically and technologically interesting.

• OSTI ID: 21137389
• Journal Information: Journal of Applied Physics, Vol. 104, Issue 1; Other Information: DOI: 10.1063/1.2952013; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM
CADMIUM SULFIDES
CHEMICAL ANALYSIS
CRYSTAL GROWTH
ELECTRON DIFFRACTION
FIELD EMISSION
FOILS
MONOCRYSTALS
MORPHOLOGY
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
QUANTUM WIRES
RAMAN SPECTRA
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SUBSTRATES
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY