Growth of Aligned Single-Crystalline TiO₂ Nanorod Arrays on Transparent Conducting Oxide Coated Glass

Abstract

In this work, we report a simple hydrothermal method for growth of aligned TiO2 nanorod arrays directly on SnO2:F (FTO) coated glass substrates without any seed layer. The rectangular nanorod is single crystalline with a tetragonal rutile structure. The diameter, length and density of the nanorods are determined by the synthesis temperature. When synthesis temperature increases from 110 to 190 °C, the diameter increases from 53 to 249 nm, and the length increases from to 324 to 1904 nm. However, the highest density is obtained at 150 °C due to nuclei coalescence at the high synthesis temperature. The activation energy for formation of TiO2 nanorod arrays is 102 kJ/mol obtained by using an Arrhenius equation.

Fabrication and Characterization of TiO₂ Nanorod Array Based Visible-Blind Ultraviolet Photodetector by Hydrothermal Process

“…It has been widely studied as a key material for fabricating photocatalytic water-splitting devices, 1,2) dye-sensitized solar cells (DSSCs), 3,4) lithium-ion batteries, 5,6) gas sensors, 7,8) and ultraviolet photo-detectors (UV-PDs). 9,10) In order to improve the performances of devices, TiO 2 nanomaterials such as TiO 2 nanoparticles, 11) TiO 2 hollow nanospheres, 12) TiO 2 nanotubes, 13) TiO 2 nanowires, 14) and TiO 2 nanorods 15) constructed nanomaterials have been extensively investigated during the last decade.…”