Authors: Qian, Guixiang; Huo, Kaifu; Fu, Jijiang; Chu, Paul K.

Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 5, May 2009 , pp. 3347-3351(5)

Publisher: American Scientific Publishers

Abstract:

Quasi-aligned ultrafine ZnS nanowire arrays have been grown directly on zinc substrates via a simple hydrothermal method. The morphology, structure, and composition are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy-dispersive X-ray spectroscopy. The single-crystalline ultrafine ZnS nanowires have a hexagonal structure with typical diameters of 5-15 nm and lengths of up to micrometers. A possible growth mechanism is proposed. Since the Zn foil serves as both the Zn source and substrate, direct synthesis and assembly of ZnS nanowires on an electrically conductive Zn substrate are accomplished in one step. Optical properties of the product are studied by photoluminescence. Field emission measurements disclose that the synthesized nanostructures possess good electron emission properties with a low turn-on field of about 5.4 V/µm at a current density of 10 µA/cm². The materials are potentially useful as cathode materials in field emission devices.

Keywords: ZnS NANOWIRES; QUASI-ALIGNED ARRAYS; ULTRAFINE; METAL SUBSTRATE; FIELD EMISSION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2009.VC10

Publication date: 2009-05-01

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• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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