Preparation and field emission study of low-dimensional ZnS arrays and tubules

Abstract

In the present work, freestanding ZnS nanotipped arrays and hollow tubules have been generated using an electrodeposition technique via template synthesis. The structures and morphologies of the arrays and tubules were investigated using X-ray diffraction and scanning electron microscopy, respectively. Electron field emission properties of the ZnS nanotipped arrays and tubules have been studied in a good vacuum condition at room temperature and current-voltage characteristics were found to follow the Fowler-Nordheim theory.It is found that ZnS tubules show good electron field emission properties at low voltage with large field enhancement factor compared to ZnS solid arrays. Optical properties of such synthesised structures were also studied using ultravioletvisible spectrophotometery.

ZnS–RGO nanocomposite structures: synthesis, characterization and field emission properties

“…[10][11][12][13] Field emission studies of ZnS nanobelts, ZnS arrays and nanotubes, ZnS branched nanotubes and ZnS hexagonal pyramids have been reported in the literature. [14][15][16][17] It is well known that graphene nanostructures tend to re-stack resulting in reduction of their effective emitting area. This reduction in the emitting area may cause deterioration in their field emission behaviour.…”