Mechanical fabrication of carbon nanotube/TiO2 nanoparticle composite films and their field-emission properties

✍ Scribed by He, Kai-Xuan ;Su, Juan ;Guo, Deng-Zhu ;Xing, Ying-Jie ;Zhang, Geng-Min

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 389 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201084202

✦ Synopsis

Abstract

A simple mechanical rubbing method for fabricating films of carbon nanotubes (CNTs) and CNTs‐based composite materials is presented, and films of CNTs, TiO~2~ nanoparticles, and CNTs‐TiO~2~ composite with different proportions are realized. The field emission (FE) properties of these films are systematically studied in comparison experiments. It is found that the TiO~2~ films show neglectable FE current in the electrical field up to 10 V/µm, and CNTs‐TiO~2~ composite films with an optimum proportion (7–10 wt.%) of TiO~2~ nanoparticles exhibit dramatically‐improved FE properties compared with pure CNT films, in lowering turn‐on filed to 1.3 V/µm (CNT films: 2.5 V/µm), suppressing the degradation of FE current, and increasing the FE uniformity and stability. The mechanisms responsible for such improvement are also discussed.