Crystal ZrS_2 nanobelt quasi-arrays were fabricated by pyrolysis of the ZrS_3 nanobelt quasi-arrays in vacuum; field-emission measurements show that the ZrS_2 nanobelt arrays are decent field emitters with a turn-on field of ～0.95 V μm~(-1) and a threshold field of 3.6 V μm~(-1). Over the past decade considerable attention has been paid to the preparation and the properties of one-dimensional (lD) nanostructures because of their distinctive geometries, unique physical properties originating from a quantum-confinement effect, and potential application in nanodevices. Field emission (FE) is based on the physical phenomenon of quantum tunneling, during which electrons are injected from a material surface into vacuum under the influence of an applied electric field. Research shows that aligned lD nanostructures with a high packing density can significantly enhance the material FE properties, therefore many field emitters were fabricated into lD nanostructured arrays such as carbon nanotubes, SiC nanocones, and Mo nanowires.
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