Au NPs decorated TiO2 nanotubes array candidate for UV photodetectors |
| |
Authors: | Suttinart Noothongkaew Jin Kyu Han Young Bum Lee Orathai Thumthan and Ki-Seok An |
| |
Institution: | Department of Physics, Faculty of Science, Ubon Ratchathani University, 34190, Thailand,Thin Film Materials Research Group, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600, Republic of Korea,Thin Film Materials Research Group, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600, Republic of Korea,Department of Physics, Faculty of Science, Ubon Ratchathani University, 34190, Thailand and Thin Film Materials Research Group, Korea Research Institute of Chemical Technology, Yuseong, Daejeon 305-600, Republic of Korea |
| |
Abstract: | This work reports the Au nanoparticles (NPs) deposited on TiO2 nanotubes (NTs) which were successfully
synthesized by a simple two-step anodization method. This fabrication process is notable for a simple and inexpensive
method for obtaining pure TiO2 NTs and Au NPs deposited TiO2 NTs. The prepared samples were
characterized by field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), X-ray photoelectron
spectroscopy (XPS), and I-V curve. We found that the size of Au NPs can be controlled by changing the
bias voltage during the deposition. The photodetectors of Au NPs/TiO2 devices showed good wavelength selectivity
with high photocurrent as compared to pure TiO2 NTs devices. Subsequently, Au NPs deposited on TiO2
NTs at bias voltage of 70 V was potentially used in fabrication of UV photodetector. At this applied voltage, a
high density of Au NPs was uniformly deposited on TiO2 NTs. As a result, it enables a high photocurrent and
great responsivity in UV region. It is suggested that the Au NPs deposited TiO2 NTs device shows good promise
for UV photodetectors with possibility to fine-tune properties in both UV and visible regions and is worthy of
further investigation. |
| |
Keywords: | Titanium oxide
Gold nanoparticles
UV photodetectors |
本文献已被 CNKI ScienceDirect 等数据库收录! |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
|