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采用水热法和喷涂法制备ZnO纳米棒/CNTs复合材料,并测试其场发射性能。首先采用水热法在ITO电极基面生长ZnO纳米棒阵列,随后通过喷涂技术在ZnO纳米棒阵列表面沉积碳纳米管(CNTs)。使用扫描电子显微镜和X-射线衍射分别表征样品的结构和形貌特征。结果表明,经喷涂沉积的CNT薄膜均匀地包裹在ZnO纳米棒尖端。对该复合材料采用二极结构测试其场发射性能,通过测试结果发现,ZnO纳米棒/CNTs复合材料可明显改善ZnO纳米棒阵列及CNT薄膜的场发射性能,该复合材料具有低开启电场强度(约0.96V/μm),高场增强因子(9881)。因此,ZnO纳米棒/CNTs复合材料是最有前景的场发射阴极材料之一。
ZnO nanorods / CNTs composites were prepared by hydrothermal method and spraying method, and their field emission properties were tested. Firstly, ZnO nanorod arrays were grown on the ITO electrode substrate by hydrothermal method, then CNTs were deposited on ZnO nanorod arrays by spray coating. The structure and morphology of the samples were characterized using scanning electron microscopy and X-ray diffraction. The results show that the deposited CNT films are uniformly coated on the tips of ZnO nanorods. The field emission properties of the composites were tested by the bipolar structure. The results show that the ZnO nanorods / CNTs composites can significantly improve the field emission properties of the ZnO nanorod array and the CNT thin films. The composites have the characteristics of low turn-on electric field strength About 0.96 V / μm), high field enhancement factor (9881). Therefore, ZnO nanorods / CNTs composites are one of the most promising field emission cathode materials.