Abstract
An arachidic acid/poly (3, 4-ethylene dioxythiophene) (AA/PEDOT) multilayer Langmuir-Blodgett (LB) film was prepared by a modified LB film method. The theories were utilized to explain the effects between HCl molecule and LB film. The gas sensitivity mechanism of poly (3, 4-ethylene dioxythiophene) (PEDOT) multilayer film can be explained by the charge transfer between p system of PEDOT and oxidization HCl system. The gas sensitivity of PEDOT LB film deposited interdigital electrode to HCl was tested. The results showed that film thickness, treating temperature, deposition speed had different influence on film gas sensitivity. The AA/PEDOT film deposited device exhibited nonlinear behavior to HCl gas at lower concentration (20–60 ppm) and linear response behavior at higher gas concentration was observed. The time of the compound LB film of the AA/PEDOT responding to the 30 ppm HCl gas is about 20 seconds, which is far quicker than the time of the film to the PEDOT-PRESS film(about 80 seconds). It is not higher film press to better film. When the film press attains 45 mNs/m, the sensitivity of the AA/PEDOT film on the contrary descends.
Similar content being viewed by others
References
Meng Xiaorong, Hu Xinting, Xing Yuanqing, et al. Research Progress on Conducting Thiophene Polymers[J]. Applied Chemical Industry, 2006, 35(7): 549–553
Hu Yue, Liu Yanjun. Research Progress in Synthesis of Conducting Polythiophene and Polythiophene Derivatives[J]. Materials Review, 2006, 20(1): 64–68
L Groenendaal, G Zotti, P H Aubert, et al. Eletrochemistry of Poly (3, 4-alkylenedioxythiophene) Derivatives[J]. Advanced Materials, 2003, 15(11): 855–879
Li Yuzhen, Xu Jinkun, Li Yuzhen, et al. Applications of Conducting Poly (3, 4-ethylenedioxythiophene)[J]. New Chemical Material, 2007, 35(3): 25–27
C W Kwon, G Campet, B B Kale. Structure of Thin Films of Poly (3, 4-ethylenedioxythiophene)[J]. Active and Passive Electronic Components, 2003, 26(4): 81–86
C Aleman, E Armelin, J I Iribarren, et al. Structural and Electronic Properties of 3, 4-Ehtylenedisulfanylfurane and Thiophene Oligomers[J]. A Theoretical Investigation, 2005, 14(9): 151–156
OuYang Jianming. Langmuir-Blodget Films Materials and Their Applications[M]. Jinan: Jinan University Press, 1999, 3: 25–28
Ke Shanming, Liu Laijun, Tang Bo, et al. Application of Langmuir-Blodgett Technique to Preparation of Advanced Materials[J]. Material Review, 2005, 19(1): 6–8
F L Carter, P C Berg, W R Barger. Langmuir-Blodgett Test Structures for Molecular Electronics-recent Trends in Japan[ J]. Molecular Electronic Devices, 1998, 18(3): 441–463
Bi Yadong, Han Enshan, Zhang Xihui. Applied Research on Langmuir-Blodgett Films Technique[J]. Chemical Industry and Engineering Progress, 2002, 21(12): 894–902
Gu Changzhi, Sun Liangyan. The Development of the LB Film Gas Sensor[J]. Transducer and Microsystem Technologies, 1992, 35(4): 8–11
J Jang, M Chang, H Yoon. Chemical Sensor Based on Highly Conductive poly (3, 4-ehtylenedioxythiophene) Nan rods[J]. Adv. Mater., 2005, 17(9): 1 616–1 620
H Y Wang, J B Lando. Gas-sensing Mechanism of Phthalocyanine Langmuir-Blodgett Films[J]. Langmuir, 1994, 10: 790–796
H C Hamaker. The London-van Der Walls Attraction between Spherical Particles[J]. Physics, 1937, 4(10): 1 058–1 072
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Natural Science Foundation of China (No.60372002)
Rights and permissions
About this article
Cite this article
Zheng, H., Jiang, Y., Xu, J. et al. Gas sensitivity of poly (3, 4-ethylene dioxythiophene) prepared by a modified LB film method. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 26, 70–74 (2011). https://doi.org/10.1007/s11595-010-0170-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-010-0170-2