Nanostructured WO3 films using high temperature anodization
Nanostructured WO3 films using high temperature anodization
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DOI：
10.1016/j.snb.2009.08.014
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发表时间：
2009-10-12
影响因子：
8.4
通讯作者：
Hu, Zheng
中科院分区：
文献类型：
--
作者：
Kalantar-zadeh, Kourosh;Sadek, Abu Z.;Hu, Zheng
We have investigated the formation of highly porous nanostructured tungsten trioxide (WO3) films of several microns thickness using elevated temperature anodization in nitric acid. Plate-like crystals with thicknesses in the range of 20-60 nm and lengths in the order of 50-1000 nm were obtained after anodization of tungsten foil in 1.5 M HNO3 at 50 degrees C. High intensity {200} WO3 crystallographic signatures from platelets revealed the presence of predominantly orthorhombic WO3 nanoplatelets in annealed (up to 550 degrees C) samples. Photocurrent measurements revealed that 4 h anodized sample at 20V produced the largest photocurrent density. High photocurrent response from the nanoplateleted films show the possibility of developing efficient WO3/electrolyte sandwiched photosensors. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
