title: Effect of TiO2 nanotube parameters on field emission properties.
abstract: The dependence of field emission properties of titanium dioxide (TiO(2)) nanotubes (NTs) has been studied as a function of NT diameter (D) and height (h), which varied in the ranges 18-500 nm and 500-12,000 nm, respectively. The studies showed a strong dependence of the field emission on these parameters. With an increase of NT diameter, the field enhancement factor increased monotonically from 120 to 3800; the current density also increased until D = 320 (current density ∼ 3.8 mA cm( - 2)), with subsequent decrease for larger diameters. The field emission properties initially improved with NT height until h = 5 µm, and later remained unchanged with further increases in h.
authors.affiliation: Department of Radiological Sciences, University of California, Irvine, CA 92697, USA. yalivov@uci.edu
authors.forename: Yahya
authors.initials: Y
authors.lastname: Alivov
authors.forename: Michael
authors.initials: M
authors.lastname: Klopfer
authors.forename: Sabee
authors.initials: S
authors.lastname: Molloi