Synthesis and field emission properties of rutile TiO2 nanowires arrays grown directly on a Ti metal self-source substrate.
Large-area and uniform quasi-aligned titanium oxide (TiO2) nanowire arrays have been produced in situ on a titanium (Ti) foil by a simple high-temperature oxidation process with acetone as the oxidant. The products are characterized by X-ray diffraction, electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The TiO2 nanowires have a rutile single-crystalline structure. The typical diameters range from 20 to 50 nm and lengths are up to a few micrometers. Since the Ti foil serves as both the source of Ti and substrate, direct synthesis and assembly of TiO2 nanowire arrays on a conductive Ti substrate is accomplished in a single step. Consequently, good intrinsic adhesion and electrical contact are achieved naturally between the nanowires and metal substrate. Such TiO2 nanowire arrays exhibit good field emission properties with a low turn-on field of 4.1 V/microm boding well for applications in vacuum microelectronics.
Huo
Kaifu
K
Hubei Province Key Laboratory of Ceramics and Refractories and Key Laboratory for Ferrous Metallurgy and Resources Utilization of MOE, College of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China.
Zhang
Xuming
X
Fu
Jijiang
J
Qian
Guixiang
G
Xin
Yunchang
Y
Zhu
Boquan
B
Ni
Hongwei
H
Chu
Paul K
PK