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For the application of field emission (FE), W18O49 nanostructures have exhibited excellent FE behaviors among tungsten oxides, which promise a much better future. However, many difficulties remain to be overcome in their application in devices. One of them is that synthesis of nanostructures in uniform W18O49 phase is difficult; tungsten oxides have tens of different phases, which can results in their...
Intensive investigation on WO3-x nanostructures has been carried out in the last decade because they possess extraordinary properties. Especially for application in field emission, W18O49 nanostructures have exhibited excellent performance. Some issues have to be addressed in fabricating vacuum microelectronic devices using W18O49 nanostructures, including how to realize well aligned nanostructure...
The authors have developed a new method to fabricate patterned W18O49 nanowire arrays by combination of thermal evaporation and lift-off technology. It is found that the phosphoric acid processing of the lift-off technology has strong effect on the field emission property of W18O49 nanowires.
Here we have successfully synthesized patterned W18O49 nanowire arrays in large scale by lift-off way, which has described in our report also to this conference. In order to remove the aluminum oxide layer, the sample was put into the phosphoric acid with a concentration of 60 % (volume ratio). The treatment time in 90°C water bath was usually about 4 hours. The treated and untreated tungsten oxide...
Controlled synthesis of ultra-long AlN nanowire arrays in different growth density has been successfully realized by direct nitridation of Al powders for the first time. These AlN nanowires have an average diameter of about 100 nm and their mean length is over 50 μm. All the synthesized ultra-long nanowires are pure single crystalline h-AlN structures with the growth orientation of [0001]. We propose...
Tungsten oxide nanostructures have been paid much attention because of their particular physics and chemical properties. But until now, it is difficult to realize patterned growth of tungsten oxide nanowire arrays. In this paper, we demonstrate that tungsten oxide nanowire arrays can be controllably synthesized in patterned arrays at low temperature of 550°C by a simple ceramic template method. The...
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