链状碳纳米管的制备及其场发射性能研究

Preparation of Chained Carbon Nanotubes and Study on Its Field Electron Emission Characteristics

利用微波等离子体化学气相沉积的方法,在钛金属层上快速制备出由众多内部中空、外观呈锥形链状的碳纳米管组成的碳膜。通过扫描电镜、透射电镜、拉曼光谱等仪器分析了碳纳米管的组成。在真空条件下,测量了碳纳米管链薄膜的场电子发射特性。用热动力学过程解释了锥形碳纳米链的生长机理。

Carbon films composed of many hollow carbon nanotubes with conical appearance are rapidly prepared through microwave plasma chemical vapor deposition(CVD)on titanium metal layers.The composition of carbon nanotubes is analyzed by using scanning electron microscopy,transmission electron microscopy and Raman spectroscopy.The field electron emission characteristics of the films of carbon nanotube chains are measured in vacuum.The growth mechanism of conical carbon nanochains is explained by thermodynamic process.