title: Synthesis and field emission of single-crystalline copper vanadate nanobelts.
abstract: Single-crystalline nanobelts of a nonstoichiometric compound Cu(1.55)V(2)O(6.55), with a thickness of 40-60 nm, width of 50-300 nm and length of several micrometers, have been synthesized on a large scale by a hydrothermal method. The structures and morphologies of the nanobelts were characterized by x-ray powder diffraction, x-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and high-resolution transmission electron microscopy. A probable growth mechanism has also been discussed. The nanobelts exhibit a turn-on field of 11.0 V µm(-1), which is defined as the macroscopic field required to produce a current density of 10 µA cm(-2). It is anticipated that the nanobelts can serve as a candidate material for future field emitters.
authors.affiliation: School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: Changjie
authors.initials: C
authors.lastname: Mao
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Wang
authors.forename: Xingcai
authors.initials: X
authors.lastname: Wu
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Zhu
authors.forename: Hong-Yuan
authors.initials: HY
authors.lastname: Chen