Field emission from patterned SnO2 nanostructures

✍ Scribed by Yongsheng Zhang; Ke Yu; Guodong Li; Deyan Peng; Qiuxiang Zhang; Hongmei Hu; Feng Xu; Wei Bai; Shixi Ouyang; Ziqiang Zhu

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 735 KB
• Volume: 253
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2006.01.009

✦ Synopsis

A simple and reliable method has been developed for synthesizing finely patterned tin dioxide (SnO 2 ) nanostructure arrays on silicon substrates. A patterned Au catalyst film was prepared on the silicon wafer by radio frequency (RF) magnetron sputtering and photolithographic patterning processes. The patterned SnO 2 nanostructures arrays, a unit area is of $500 mm  200 mm, were synthesized via vapor phase transport method. The surface morphology and composition of the as-synthesized SnO 2 nanostructures were characterized by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). The mechanism of formation of SnO 2 nanostructures was also discussed. The measurement of field emission (FE) revealed that the as-synthesized SnO 2 nanorods, nanowires and nanoparticles arrays have a lower turn-on field of 2.6, 3.2 and 3.9 V/mm, respectively, at the current density of 0.1 mA/cm 2 . This approach must have a wide variety of applications such as fabrications of micro-optical components and micropatterned oxide thin films used in FE-based flat panel displays, sensor arrays and so on.