title: Amazing ageing property and in situ comparative study of field emission from tungsten oxide nanowires.
abstract: In this work, needle-shaping of tungsten oxide nanowires occurred during field emission characterization. Compared with nanowires with a flat apex, needle-shaped emitters showed a lower threshold field of 11.9 V µm(-1) for 1 mA cm(-2) and a higher emission current of 1120 µA at 16.2 V µm(-1). Most notably, the measured ageing current dramatically increased by more than four times until it slightly decreased, tending towards stability. In addition, the samples showed striking difference in their nonlinear Fowler-Nordheim plot before and after ageing tests. Selected area diffraction and transmission electron microscope characterizations were used to further study these amazing results.
authors.affiliation: Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, People's Republic of China. shlyue@pku.edu.cn
authors.forename: Shuanglin
authors.initials: S
authors.lastname: Yue
authors.forename: Huayong
authors.initials: H
authors.lastname: Pan
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Ning
authors.forename: Jianbo
authors.initials: J
authors.lastname: Yin
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Wang
authors.forename: Gengmin
authors.initials: G
authors.lastname: Zhang