The preparation of grid-textured V2O5 films and their potential applications in gas sensing  

作　　者：CHENG Rong HUANG WeiYi LIU XiangBo LING Francis Chi Chung GAO Ju NI Hao 

机构地区：[1]Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China [2]Department of Physics,The University of Hong Kong,Hong Kong,China [3]College of Science,China University of Petroleum(Huadong),Qingdao 266580,China

出　　处：《Science China(Technological Sciences)》2020年第3期467-471,共5页中国科学（技术科学英文版）

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)

摘　　要：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.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.

关 键 词：V2O5 thin film gas sensing 

分 类 号：TB383.2[一般工业技术—材料科学与工程]