Sol Gel Synthesis of Tungsten Oxide Thin Film in Presence of Surfactant for NO2 Detection

Sensors & Transducers

Vibha Srivastava¹  A. K. Srivastava¹  K. N. Sood¹  Kiran Jain¹ 

[1] Electronic Materials Division, National Physical Laboratory Dr. K. S. Krishnan Marg, New Delhi, India;

关键词: Oxides;    Chemical synthesis;    X-ray diffraction;    Electrical properties;   

DOI  :  

来源: DOAJ

【 摘 要 】

The sol–gel method was used to prepare WO3 powder as well as film. The addition of block copolymer F 127 surfactant during synthesis resulted in a highly porous structure with reduced grain size. WO3 thin films prepared without surfactant addition showed a lamellar structure on annealing at 350º C, while the surfactant - added samples showed spherical nodules. NO2 gas response was enhanced for thin films prepared in presence of surfactant as compared to the films without surfactant. The film annealed at 600° C showed higher response magnitude as compared to 350º C annealed film. The gas response for a thick film was quite low as compared to thin film sensor derived through similar route.

【 授权许可】

Unknown