Preparation, Characterization and Properties of CNT/CuO Core/shellstructured Nanocomposites

摘要

In order to enhance the sensitivity of carbon nanotube based chemical sensors at room temperature operating, CNT/CuO core/shell-structured nanocomposite was prepared under hydrothermal reaction condition. The resulting-product was characterized with TEM (transmission electron microscopy) and XRD (X-ray diffraction). A chemical prototype sensor was constructed based on CNT/CuO nanocomposite and an interdigital electrodes on flexible polymer substrate. The gas-sensing behaviors of the sensor to some typical organic volatiles were investigated at room temperature operating. The results indicated that the CNT/CuO nanocomposite was core/shell structure, CuO was coated on the surface of CNT. This nanocomposite showed dramaticly enhanced sensitivity to some typical vapors compared with CNT. This study would provide a simple, low-cost and general approach to functionlize the carbon nanotube. It is also in favor of developing chemical sensors with high sensitivity at low temperature operating.