Novel nano-structured films of V2O5 are prepared by pulsed laser deposition method. Nanoscaled V2O5 ridges lie on SrTiO3 substrate and construct into grid-textured structures. Structural properties of the films have b...Novel nano-structured films of V2O5 are prepared by pulsed laser deposition method. Nanoscaled V2O5 ridges lie on SrTiO3 substrate and construct into grid-textured structures. Structural properties of the films have been analyzed by scanning electron microscope, X-ray diffraction and transmission electron microscope. The films have enlarged surface-to-volume ratio due to the ridge-channel structure which makes them applicable to gas sensing. Therefore, gas sensors based on the V2O5 films have been assembled which present reliable sensing properties to gaseous acetone, and ethanol at room temperature. The physical-chemical reactions between adsorbed O2^– and testing gases are the possible reason for this property.展开更多
The nanocomposite films were prepared by poly(ethylene oxide), PEO, intercalation in V2O5 xero-gel in sol-gel. The synthesis and state of the films are investigated by the XRD, IR, SEM, etc. The results show that V2O5...The nanocomposite films were prepared by poly(ethylene oxide), PEO, intercalation in V2O5 xero-gel in sol-gel. The synthesis and state of the films are investigated by the XRD, IR, SEM, etc. The results show that V2O5, xerogel is a layered structure which arranges in c-direction. The mterlayer distance of V2O5 xerogel increases remarkably when PEO is intercalated in V2O5 xero-gel interlayer. PEO has strong interaction with V2O5 host. The surface of the films is homogeneous without holes and cracks.展开更多
基金supported by the National Key Project for Basic Research(Grant No.2014CB921002)the National Natural Science Foundation of China(Grant No.11374225)the Research Grant Council of Hong Kong(Grant No.702112)
文摘Novel nano-structured films of V2O5 are prepared by pulsed laser deposition method. Nanoscaled V2O5 ridges lie on SrTiO3 substrate and construct into grid-textured structures. Structural properties of the films have been analyzed by scanning electron microscope, X-ray diffraction and transmission electron microscope. The films have enlarged surface-to-volume ratio due to the ridge-channel structure which makes them applicable to gas sensing. Therefore, gas sensors based on the V2O5 films have been assembled which present reliable sensing properties to gaseous acetone, and ethanol at room temperature. The physical-chemical reactions between adsorbed O2^– and testing gases are the possible reason for this property.
基金This project was supported by National Natural Science Foundation of China (Grant No.59802009 ) and Hubei Province Natural Science Foundation(Grant No. 99J053).
文摘The nanocomposite films were prepared by poly(ethylene oxide), PEO, intercalation in V2O5 xero-gel in sol-gel. The synthesis and state of the films are investigated by the XRD, IR, SEM, etc. The results show that V2O5, xerogel is a layered structure which arranges in c-direction. The mterlayer distance of V2O5 xerogel increases remarkably when PEO is intercalated in V2O5 xero-gel interlayer. PEO has strong interaction with V2O5 host. The surface of the films is homogeneous without holes and cracks.
