Nanowire and nanotube arrays feature in two new ‘Hot Articles’

Two new Journal of Materials Chemistry ‘Hot Articles’ have been published online which feature arrays, one of nanowires, and one of nanotubes.  These arrays have exciting potential in a wide range of applications.
 

Growth and replication of ordered ZnO nanowire arrays on general flexible substrates

Growth and replication of ordered ZnO nanowire arrays on general flexible substrates
Su Zhang, Yue Shen, Hao Fang, Sheng Xu, Jinhui Song and Zhong Lin Wang
J. Mater. Chem., 2010, Advance Article
DOI: 10.1039/C0JM02915G, Communication  

 A team from Peking University and the Georgia Institute of Technology describe the synthesis, via hydrothermal method on flexible substrates of vertically aligned and site controllable ZnO nanowire arrays in this Journal of Materials Chemistry Communication.

During the past several years, there has been a growing interest in one-dimensional ZnO nanostructures for their potential applications in fabricating electronic, optoelectronic, electromechanical and electrochemical devices. Current synthesis techniques require single crystallinity of the substrate and high growth temperatures, seriously limiting the compatibility of these methods with organic substrates for applications in flexible electronics. Hydrothermal synthesis is an attractive alternative because it could be carried out at a relatively low temperature around 70–90 °C, and could allow for multiple crystalline and even amorphous substrates.  Zhong Lin Wang and colleagues have developed a new technique of synthesizing patterned ZnO nanowire arrays on multiple flexible organic substrates using a novel chemical approach and a new transferring method.  

To find out more read the full article here.  Free until November 12th!  

Self-assembled anodic TiO2 nanotube arrays: electrolyte properties and their effect on resulting morphologiesSelf-assembled anodic TiO2 nanotube arrays: electrolyte properties and their effect on resulting morphologies
Sorachon Yoriya and Craig A. Grimes
J. Mater. Chem., 2011, Advance Article
DOI: 10.1039/C0JM02421J, Paper

A team from The Pennsylvania State University have, for the first time, revealed the parameters, during synthesis, which affect the morphology of TiO2 nanotube arrays.  

Self-assembled TiO2 nanotube arrays fabricated by electrochemical anodization of titanium are of great interest having been successfully used in many applications including gas sensing, water photoelectrolysis, drug delivery and photovoltaics.  In the synthesis of TiO2 nanotube array films it is important to achieve specific nanotube array morphological features, including pore size, length, wall thickness, and tube-to-tube spacing for enhanced device performance, however, the key parameters controlling self-organization of the nanotubes have remained unclear. This study, by Sorachon Yoriya and Craig Grimes elucidates the dependence of the electrolyte conductivity on the titanium concentration, and electrolyte effect on the morphological features of the resulting nanotubes.  

To find out more read the full article here.  Free until November 12th!

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