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We report a novel approach to the rational fabrication of high quality strain controlled wurtzite ZnO nanowire arrays on conductive silicon and ITO substrates by a facile hydrothermal method. The quality of the ZnO nanowire arrays is dramatically improved by hanging the substrate above from the bottom of the Teflon lined autoclave. For comparison, the field emission device performance of the ZnO nanowire...
Field emission electron source can be used in display devices, microwave amplifier, X-ray tubes, and etc. However, the electron current has to be large enough and modulated and well in these applications. In this paper, the single layer or double layer grapheme oxide sheets were used in the surface-conducted field emission electron source. Finally, both the field emission current has been improved...
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