Enhanced Field Emission from Vertical ZnO Nanoneedles on Micropyramids |
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Authors: | ZHANG Yang DIAO Da-Sheng |
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Institution: | Institute for Physics of Microsystems and Department of Physics, Henan University, Kaifeng 475004 |
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Abstract: | Vertical ZnO nanoneedles with sharp tips are secondarily grown on tips of primarily grown ZnO micropyramids by a vapour transport process. The field emission (FE) properties exhibit a lower turn-on electric field and a higher field enhancement factor as compared with vertical ZnO microrods. This result indicates that ZnO nanoneedles have good optimum shapes for FE due to electron accumulation at sharp tips. |
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Keywords: | 81 05 Dz 79 70 +q 81 15 Gh |
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