Title :
Photoconductivity of Au-coated TiO2 nanotube arrays
Author :
Ying Zhao ; Hoivik, Nils ; Kaiying Wang
Author_Institution :
Dept. of Micro & Nano Syst. Technol., Buskerud & Vestfold Univ. Coll., Horten, Norway
Abstract :
In this paper, we report fabrication and photoconductive properties of Au-doped titanium nanotube (TNT) arrays. Scanning electron microscope with energy dispersive x-ray spectroscopy (SEM-EDX) indicates that diameter of as-prepared TNT is distributed from 80 to 160 nm. The as-prepared TNTs show an amorphous structure and completely converted into anatase phase after annealing at 450°C for 3 hours. A sandwich-type (Indium tin oxide glass/TNT or Au-doped/Ti) device was assembled for photoelectric characterization. Photocurrent of Au-doped TNT arrays is increased to 28.7 mA at applied voltage of 1 V under ultra-violet radiation as compared with that of pristine TNT device (0.7 mA). A phenomenal sketch is given to understand enhancement of the photoconductivity.
Keywords :
X-ray chemical analysis; annealing; gold; nanofabrication; nanophotonics; nanotubes; photoconductivity; scanning electron microscopes; titanium compounds; ultraviolet detectors; SEM; TiO2:Au; annealing; energy dispersive X-ray spectroscopy; nanofabrication; nanotube arrays; photoconductive properties; photoconductivity; scanning electron microscope; size 80 nm to 160 nm; temperature 450 degC; time 3 hour; Gold; Indium tin oxide; Lighting; Photoconductivity; Photodetectors; Substrates; Titanium; TiO2 nanotubes photoconductivity; gold surface modification; resistive photoconductive device;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2014 IEEE 14th International Conference on
Conference_Location :
Toronto, ON
DOI :
10.1109/NANO.2014.6967993
