Enhanced Field Emission Characteristics of ZnS Dentalation Nanostructures
Large quantities of ZnS dentalation nanostructures were synthesized successfully at low temperature using a simple chemical vapor deposition method, and the microstructures and field emission properties of the dentalation structures were investigated. The results indicated that the stem of the dentalation structures is single-crystalline but the surfaces of the teeth are amorphous. The photoluminescence properties show a strong green emission at 520.89 nm due to S vacancy. Investigations on the field emission properties of the ZnS dentalation nanostructures imply that the turn-on field is about 5.56V/μm at an anode-cathode distance of 150μm, which should be attributed to the specific sharp tips and high aspect ratios of the present needle-shaped structure. The field emission behavior of the ZnS obeys Fowler-Nordheim relationship. The results could be valuable for using the ZnS nanostructure as cold-cathode field-emission materials.
J. J. Qi et al., "Enhanced Field Emission Characteristics of ZnS Dentalation Nanostructures", Advanced Materials Research, Vol. 936, pp. 379-383, 2014