Low-humidity sensing properties of diamine- and β-cyclodextrin-functionalized graphene oxide films measured using a quartz-crystal microbalance.

• Main Authors: Yu-Te Lin, 林育德
• Other Authors: Pi-Guey Su
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/nxgevr

碩士 === 中國文化大學 === 化學系應用化學碩士班 === 104 === Low-humidity sensing properties of functionalized graphene oxide (GO) thin films that had –COOH, -CONHC2H4NH2, -CONH(C2H4)3NH2 and -cyclodextrin (-CD) functional groups were investigated by using a quartz crystal microbalance (QCM). The functionalized GO thin films were characterized by atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). Water vapor molecules were easily adsorbed onto the functionalized GO thin film that had –COOH functional group, but hardly adsorbed onto the functionalized GO thin film that had -CONH(C2H4)3NH2 functional group because of the difference hydrogen bond stability between water molecules and functionalized GO thin films. Adsorption dynamic analysis, molecular mechanics calculation (association constant), was applied to elucidate that the functional groups on the GO was related to the humidity-sensing properties (sensitivity), especially at low humidity levels.