Published November 16, 2012 | Version v1
Journal article Metadata-only

Enhanced field emission from hydrogenated TiO2 nanotube arrays

Creators

  • 1. Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, 730070 (China)
  • 2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000 (China)
  • 3. State Key Laboratory of Applied Organic Chemistry (SKLAOC), Lanzhou University, Lanzhou 730000 (China)

Description

The field emission (FE) properties of TiO2 nanotube arrays (TNAs) synthesized by anodization are dramatically improved after hydrogenation at various temperatures in a range of 400–550 °C. Compared with pristine TNAs, the turn-on fields of hydrogenated TNAs (H:TNAs) are significantly decreased from 18.23 to 1.75 V μm−1, and closely related to hydrogenation temperature. Importantly, the optimized sample of H:TNAs prepared at 550 °C shows excellent FE performances involving both a low turn-on field of 1.75 V μm−1, a high current density of 4.0 mA cm−2 at 4.50V μm−1, and a remarkable FE stability over 480 min. The substantially enhanced FE properties can be attributed to the combination of a typical tubular morphology, a reduced work function and the improved conductivity of H:TNAs. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/0957-4484/23/45/455204

Additional details

Identifiers

DOI
10.1088/0957-4484/23/45/455204;

Publishing Information

Journal Title
Nanotechnology (Print)
Journal Volume
23
Journal Issue
45
Journal Page Range
[6 p.]
ISSN
0957-4484

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44046755
Subject category
S77: NANOSCIENCE AND NANOTECHNOLOGY;
Descriptors DEI
ANODIZATION; CURRENT DENSITY; FIELD EMISSION; HYDROGENATION; MORPHOLOGY; NANOTUBES; PERFORMANCE; STABILITY; TITANIUM OXIDES; WORK FUNCTIONS
Descriptors DEC
CHALCOGENIDES; CHEMICAL COATING; CHEMICAL REACTIONS; CORROSION PROTECTION; DEPOSITION; ELECTROCHEMICAL COATING; ELECTROLYSIS; EMISSION; FUNCTIONS; LYSIS; NANOSTRUCTURES; OXIDES; OXYGEN COMPOUNDS; SURFACE COATING; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS