Nanocomposite of cobalt oxide nanocrystals and single-walled carbon nanotubes for a gas sensor application

作者：Li, Wei; Jung, Hyuck; Nguyen Duc Hoa; Kim, Dojin^*; Hong, Soon-Ku; Kim, Hyojin

来源：Sensors and Actuators B: Chemical , 2010, 150(1): 160-166.

DOI：10.1016/j.snb.2010.07.023

• Polymer-assisted deposition
• Carbon nanotube
• Sensor
• Nanocrystalline cobalt oxide

A polymer-assisted deposition method was used to prepare nanocomposite structures of cobalt oxide and single-walled carbon nanotubes (SWCNTs) for a gas sensor application Scanning electron microscopy images show that the deposition morphology of Co3O4 is closely related to the viscosity and metal ion concentration in the precursor solution X-ray diffraction data combined with Raman spectra show that the composite film has high crystalline quality The basic sensing behavior was evaluated with NOx gas as an electron-accepting gas and H-2 as an electron-donating gas The composite shows a response of similar to 200% upon exposure to 4%H-2 at room temperature This value is higher than that observed in SWCNT thin film and Co3O4 film, as well as in other pure and functionalized CNTs The enhancement may have origina

• 出版日期2010-9-21