电泳法制备碳纳米管场发射阴极的研究

Fabrication of Field Emission Cathode of Carbon Nanotubes Film by Electrophoretic Deposition

利用传统的电泳方法,在玻璃基片上成功地制备了场发射用碳纳米管阴极薄膜。用扫描电子显微镜和拉曼光谱观察了薄膜的形貌和结构,并测试了所制备的薄膜阴极的场发射特性。实验结果表明在玻璃的银浆导电层上沉积了一层较薄而均匀的碳纳米管膜,其场发射特性与丝网印刷工艺制备的阴极有相似甚至更佳的性能,具有更好的发射均匀性。采用电泳方法制备场发射阴极具有简单易行,成本低廉等优势,可以避免丝网印刷工艺带来的有机杂质污染和发射不均匀等问题。

Thin films of carbon nanotubes （CNTs） were deposited on glass substrate by electrophorefie deposition （EPD） .The CNTs films were characterized by scanning electron microscopy （SEM） and Raman spectrum.The films were thin and uniform. Field emission properties of EPD CNTs cathode and screen printed CNTs cathode were compared. The results indicate that the EPD CNTs cathode -has low on-set field, higher emission current, and higher luminescence uniformity, than that of the screen printed CNTs cathode.