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纳米工具电极是进行纳米电解加工的必备条件,其特征尺寸直接影响纳米结构的最终尺寸.提出了利用电弧放电将碳纳米管束焊接在钨针尖上的纳米工具电极制备方法,并通过试验研究了钨针的针尖圆弧半径和放电电压对制备碳纳米管工具电极的影响.试验结果表明,不同尖端圆弧半径的钨针,所需有效放电电压不同,圆弧半径越小,有效放电电压越小,强电场分布越集中,越容易将碳纳米管束焊接在针尖的顶端;圆弧半径越大,强电场分布区域越大,越不容易控制碳纳米管束焊接的方向性.在针尖圆弧半径约为100 nm和300 nm的钨针上,放电电压分别为25 V和35 V时,成功制备出碳纳米管工具电极.
The nano-tool electrode is a prerequisite for the nano-electrolysis process, and its characteristic size directly affects the final size of the nano-structure. A preparation method of a nano-tool electrode by using an arc discharge to weld a carbon nanotube bundle on a tungsten needle tip is proposed. The influence of the tip arc radius and the discharge voltage of tungsten needle on the electrode for preparing carbon nanotubes.The experimental results show that the effective discharge voltage is different for the tungsten needle with different tip arc radius, the smaller the arc radius, the more the effective discharge voltage The smaller the distribution of the strong electric field, the easier it is to weld the carbon nanotube bundle to the tip of the tip. The larger the radius of the arc is, the larger the distribution of the strong electric field is and the less it is easy to control the orientation of the carbon nanotube bundle. About 100 nm and 300 nm tungsten needles, the discharge voltage of 25 V and 35 V, successfully prepared carbon nanotube tool electrode.