直接在金属基片上生长超长宏观定向碳纳米管

Direct growth of ultra-long and aligned carbon nanotubes on metals

在水辅助氧化作用下，直接在金属镍片上生长出宏观上定向生长的螺旋状碳纳米管，其长度达到7mm，直径在100-200nm，测试其场发射特性，开启场强为1．6V／μm，最大发射电流密度可达6mA／cm^2。

We are synthesize the ultra-long and aligned carbon nanotubes on metals in water-assisted.The length of carbon nanotube＇s bundle is 7mm,the diameter is about 100-200nm. The result of measure field emission of the aligned carbon nanotubes shows a turn-on voltage of 1.6V/μm, the highest field emission current density achieved was 6mA/cm^2.