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Porous flower-like ZnO microspheres were successfully fabricated by a facile, green and cost efficient method. In this method, the flower-like precursor was first synthesized and subsequently annealed at 450°C for 30min. The SEM and TEM results reveal that the obtained microspheres well inherit the morphology of the precursor and possess numerous mesopores which originated from the release of carbon...
Highly aligned ZnO nanotube array films on the conducting substrates have been synthesized by a simple hydrothermal method. The as-synthesized ZnO nanotubes have diameters of 300-400nm and lengths of 7μm (the aspect ratios of ~20). The field emission of ZnO nanotube array films shows a turn-on field of about 4.6V/μm at a current density of 1μA/cm and emission current density up to about 0.22mA/cm2...
A direct current (DC) electrophoresis deposition method (EPD) was used for preparing Tetrapod-like ZnO film cathode on stable and electrically conducting metal mesh substrates. Field-emission measurement reveals that the tetrapod-like ZnO film deposition on metal mesh posses a good emission property with very low turn-on electric fields of 1.95V/μm and low threshold field of ~3.8V/μm (for current...
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