Direct growth of quasi-aligned ultrafine zns nanowire arrays on conducting zinc foils and their field emission proderties

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Detail(s)

Original languageEnglish
Pages (from-to)3347-3351
Journal / PublicationJournal of Nanoscience and Nanotechnology
Volume9
Issue number5
Publication statusPublished - May 2009

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/tm at a current density of 10 Ncm2. The materials are potentially useful as cathode materials in field emission devices. Copyright © 2009 American Scientific Publishers All rights reserved.

Research Area(s)

  • Field emission., Metal substrate, Quasi-aligned arrays, Ultrafine, ZnS nanowires

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