thin film polypyrrole swcnts nanocomposites-based nh3 sensor

... The thin film and the porous film could be the reasons explaining why the 3PPY /SWCNTs composite-based sensor exhibits a higher response compared to that of PPY-based 4sensors. Additionally, SWCNTs ... PPY /SWCNTs composite sensor depends on the reactivity and 2diffusion of NH3gas molecules inside the composite-sensing thin film. Therefore, when the 3thickness of the film decreases, the sensor ... Appl. Surf. Sci. 211 (2003) 24166–183.25Accepted ManuscriptTitle: Thin Film Polypyrrole/ SWCNTs Nanocomposites-Based NH3 Sensor Operated at RoomTemperatureAuthors: Nguyen Van Hieu, Nguyen...

highly sensitive thin film nh3 gas sensor operating at room

... performance of the gas sensor at low operatingtemperature.However, the SWCNTs- doped SnO2 sensor behaves as ann-type semiconductor, while our MWCNTs/SnO2composite sensor behaves as a p-type ... MWCNTs/SnO2composite is too thin, the responsewill be decreased. Such gas-response dependent on the thicknessof the composite MWCNTs/SnO2 thin film sensor has not beenclear so far. It seems that the thin film ... of the thin film composite sensors resultsin a decrease in the response due to the increase of the diffusionlength of gas [49].4. ConclusionA new composite MWCNTs/SnO2 thin film gas sensor has...

influence of polymerization temperature on nh3 response of pani tio2 thin film gas sensor

... reported a PANI/TiO2nanocompos-ite thin film gas sensor prepared at room temperature [10].Ithas been revealed that the PANI/TiO2nanocomposite thin filmgas sensor exhibited higher response values, ... polymerization temperature on the gas response of the PANI/TiO2 thin film gas sensor was investigated. The results showed that the PANI/TiO2 thin film prepared at 10◦C was superior to those prepared ... online at www.sciencedirect.comSensors and Actuators B 129 (2008) 319–326Influence of polymerization temperature on NH3response of PANI/TiO2 thin film gas sensor Huiling Tai, Yadong Jiang∗,...

gas sensing properties of metal - organics derived pt dispersed - tio2 thin film fired in nh3

... of the thin films was about 70 nm.The gas sensitivity of the thin film with Ag electrodewas almost the same as that with Au electrode. However,Au electrode was easily torn from thin film. Therefore, ... the film fired at 4508C. The thin film fired at 4508Cproved to have the highest gas sensitivity and selectivity toH among reducing gases: H , CO and CH . A XRD224profile of this thin film ... et al.rSensors and Actuators B 67 2000 270–274272Table 2Ž.Relative resistance of the thin film fired in different atmosphere measured at 2008CNumber Firing atmosphere Kind of thin film Kind...

modeling of the conduction in a wo3 thin film as ozone sensor

... Sensors and Actuators B 119 (2006) 327–334ReviewModeling of the conduction in a WO3 thin ﬁlm as ozone sensor J. Gu´erin∗, K. Aguir, M. BendahanL2MP ... experimental sensor. Fig. 8. Simulation of the response of the layer vs. ozone temperature at 0.8 ppmozone in the two adsorption cases and comparison with an experimental sensor. obtained with aWO3 sensor ... Comparison between modeling and experimental sensor response 3335. Conclusion 333References 3341. IntroductionThe performances improvement of the microsensors requiresthe control of technology...

new technology of metal oxide thin film preparation for chemical sensor application

... Sensors and Actuators B 109 (2005) 128–134New technology of metal oxide thin filmpreparation for chemical sensor applicationViacheslav Khatkoa,∗, ... direction includes the technologies via with thin films of nanometer grain size can be deposited. As a rule,these technologies are used to obtain thin film gas sensors.For example, active layers with ... mi-cromachined gas sensors, in: Proceedings of the 16th European Con-ference on Solid State Transducers EUROSENSORS XVI, Prague,2002, pp. 257–258.[10] S.R. Morrison, Semiconductor gas sensors, Sens....

sensitivity properties of a novel no2 gas sensor based on mesoporous wo3 thin film

... ofWO3 thin film gas sensors. Part 1. Thin film devices, sensors andactuators, Thin Solid Films 287 (1996) 258–265.[7] V. Demarne, A. Grisel, An integrated low-power thin film CO gassensors ... WO3 thin films. These sensors havebeen reported to have good selectivity for low concentrationNOxgas [12]. In this study, we developed a novel NO2gassensors based on mesoporous WO3 thin ... to prepare thin films on Al2O3substrate that was coated with Pt elec-trode by dip coating. The thin films can be dried within sev-eral hours at 60◦C. The as-made bulk samples or thin filmswere...

tio2 thin film gas sensor for monitoring ammonia

... time of the TiO2 thin film gas sensor was studied for sensing ammonia.© 2006 Elsevier Inc. All rights reserved.Keywords: TiO2; Thin films; Gas Sensor; Sputtering; Ammonia sensor 1. IntroductionThere ... deposition of TiO2filmsusing DC magnetron sputtering and the characterizationof the films for gas sensing applications.2. Experimental2.1. Film preparationTitanium oxide thin films were deposited ... electrodes. In the present study a planarstructure thin film gas sensor was fabricated with TiO2as the sensing layer. A thin sensitive TiO2 film wasdeposited by a DC reactive magnetron sputteringtechnique...

wo3 thin film sensor prepared by sol–gel technique and its low-temperature sensing properties to trimethylamine

... characteristics of the thin film sensor to trimethylamine were measured. A low-temperature,high sensitivity, excellent selectivity, quick response and recover of thin film sensors to trimethylamine ... WO3 thin film sensor is very sensi-tive to TMA at 50–85◦C, but not sensitive to NH3, gasoline,C2H5OH, CH4and CO and water vapor. These results in-dicate that the WO3 thin film sensor ... the industrial technology of integrated circuits.Such problems can be overcome by thin films [4,5]. The thin film sensors can be fabricated by a number of tech-niques, such as vacuum vaporization...

Tài liệu Báo cáo " Survey of WO3 thin film structure built on ito/glass substrates by the Raman and xrd spectroscopies" doc

... WO3 thin films is electrochromic devices based on electrochromism, in which optical properties WO3 alter reversibly under electrical bias applied [1-3]. Moreover, recently WO3 thin films ... 12 March 2009 Abstract. Tungsten oxide film was deposited on ITO-coated glass by using RF magnetron sputtering method from WO3 ceramic target. Thin film preparation – process took place in ... effects on the Raman and XRD spectrograms of WO3 films. Keywords: WO3 structure, WO3 /ITO/glass, Raman spectroscopy. 1. Introduction WO3 thin films have been studied for along time due to their...

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