Abstract
Single-crystalline nanobelts of a nonstoichiometric compoundCu1.55V2O6.55, with a thickness of 40–60 nm, width of 50–300 nm and length of several micrometers, havebeen synthesized on a large scale by a hydrothermal method. The structures andmorphologies of the nanobelts were characterized by x-ray powder diffraction, x-rayphotoelectron spectroscopy, scanning electron microscopy, transmission electronmicroscopy and high-resolution transmission electron microscopy. A probablegrowth mechanism has also been discussed. The nanobelts exhibit a turn-on field of11.0 V µm−1, which is defined as the macroscopic field required to produce a current density of10 µA cm−2. It is anticipated that the nanobelts can serve as a candidate material for future fieldemitters.
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