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Synthesis of Various Metal/TiO2 Core/shell Nanorod Arrays
Wei Zhu,Guan-zhong Wang*,Xun Hong,Xiao-shuang Shen
Author NameAffiliationE-mail
Wei Zhu Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Guan-zhong Wang* Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China gzwang@ustc.edu.cn 
Xun Hong Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Xiao-shuang Shen Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China  
Abstract:
We present a general approach to fabricate metal/TiO2 core/shell nanorod structures by two-step electrodeposition. Firstly, TiO2 nanotubes with uniform wall thickness are prepared in anodic aluminum oxide (AAO) membranes by electrodeposition. The wall thickness of the nanotubes could be easily controlled by modulating the deposition time, and their outer diameter and length are only limited by the channel diameter and the thickness of the AAO membranes, respectively. The nanotubes' tops prepared by this method are open, while the bottoms are connected directly with the Au film at the back of the AAO membranes. Secondly, Pd, Cu, and Fe elements are filled into the TiO2 nanotubes to form core/shell structures. The core/shell nanorods prepared by this two-step process are high density and free-standing, and their length is dependent on the deposition time.
Key words:  Titania, Nanotube, Core/shell, Electrodeposition, Membrane
FundProject:
多种金属/TiO2核壳纳米棒阵列的通用制备方法
祝巍,王冠中*,洪勋,沈小双
摘要:
使用了一种具有较大通用性的方法制备了金属/二氧化钛(TiO2)核壳纳米结构. 采用电沉积方法在多孔氧化铝模板(AAO)孔洞中沉积壁厚均一的TiO2纳米管,TiO2纳米管的壁厚可以通过沉积时间来控制,而纳米管的直径和长度则由模板孔洞大小和模板厚度决定. 采用这种方法制备的TiO2纳米管顶端是开放的,而底端连接在电沉积前溅射在AAO模板背面的金膜上. 这种TiO2纳米管阵列结构适合进行二次电沉积,以它为模板将Pd、Cu、Fe等金属沉积到纳米管中形成核壳纳米棒结构. 这是一种可以用于制备多种金属/TiO2核壳纳米结构的通用方法,采用这种方法制备的金属/TiO2核壳纳米棒结构具有填充率高和取向性好的特点,而且它们的壁厚和长度可以通过分别改变两步电沉积的时间来控制.
关键词:  二氧化钛,纳米管,核壳结构,电沉积,模板
DOI:10.1088/1674-0068/24/01/91-96
分类号: