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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...
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...
In this paper, vertically AlN nanocone arrays have been successfully fabricated at 550degC. They are all single crystals with a wurtzite structure and grow along [0001] orientation. These AlN nanocones are found to have good field emission behaviors, suggesting they could be excellent cathode nanomaterials in future.
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