GAS SENSOR

[16] A.Z. Sadek, W. Wlodarski, K. Kalantar-Zadeh, C. Baker, R.B. Kaner,Doped and dedoped polyaniline nanofiber based conductometric hydrogengas sensors, Sens. Actuat. A: Phys. 139 (2007) 53–57.[17] A.L. Kukla, Y.M. Shirshov, S.A. Piletsky, Ammonia sensors based onsensitive polyaniline films, Sens. Act[r]

sensors, Sens. Actuators 10 (1986) 141–163.[6] J.B. Miller, C. Hort, T.B. Scheffler, Catalytic Sensor, US Patent No.6911180132, 2005.[7] M.G. Jones, T.G. Nevell, The detection of hydrogen using catalyticflammable gas sensors, Sens. Actuators 16 (1989) 215–224.[8] D.W. Dabill, S.J. Gentry,[r]

nanoparticles,which can promote the adsorption of NH3molecules on theoxide surface and accelerate the oxidizing process.AcknowledgmentsThe authors would like to appreciate the financial supportsof the Natural Science Foundation of China (60225010) and863 Project No. (2004AA513024). We also thank Prof[r]

unsafe for detecting combustion gases [4–6]. Currently, SnO2and noble metal doped SnO2-based sensors are commerciallyavailable [7,8]. Still, much effort has been made to improvegas-sensitivity as well as to reduce operating temperature byintroducing dopants or decreasing SnO2particle size to thenano[r]

abstractIn this work, design and fabrication of micro-gas-sensors, polymerization and deposition of poly(pyrrole)thin films as sensitive layer for the micro-gas-sensors by electrochemical processing, and characterizationof the polymer films by FTIR, X-ray photoelectron spectroscopy (XPS)[r]

Room-temperature semiconductor gas sensor based on nonstoichiometrictungsten oxide nanorod filmYong Shin Kim,a͒Seung-Chul Ha, Kyuwon Kim,b͒Haesik Yang,c͒Sung-Yool Choi, and Youn Tae KimElectronics and Telecommunications Research Institute, Daejeon 305-350, Republic of KoreaJoon T. ParkD[r]

systematically investigated as a function of annealing and operating temperature, using H2S, CO, and NO2as test gases. The sensitivity was foundto lie below and around the ppm level for H2S and NO2, respectively.© 2005 Elsevier B.V. All rights reserved.Keywords: Microstructure; Electrical properties[r]

Later on, argon was let in and the sputtering pressurewas maintained. In order to check the stability of thepartial pressu re, after each deposition the argon flowwas stopped and the oxygen partial pressure waschecked and it was found to be at the value set before.Such a practice is generally follow[r]

sor for ozone detection with a concentration down to 50 ppb atroom temperature. Commercial SWCNTs were dispersed in N,N-dimethylformamide (DMF) and deposited over electrodes withconventional interdigitated design. To enhance the performance,a heating component was integrated into the gas s[r]

signals to different propane concentrations. The low impurity levelof the synthesized materials results in the lowest signal drift.We found that crystallite growth causes signal decrease by 1%during 590 h of operation for this material. On the other hand,high impurity concentration in commercial mat[r]

the resistance) demonstrates that the mesoporous gas sen-sor has the selectivity to distinguish oxidizing and reduc-ing gases. The stability of the sensing characteristics wasexamined several times in a week. It was found that theinitial resistance was approximately maintained, but witha slig[r]

C). After variousefforts, such micro-platforms have been realized. An example isshown in Fig. 13 [19]. The platform, a square of about 100 ␮minwidth, is attached with a micro-heater and a pair of comb typeelectrodes. On heating in a pulse mode of 100 ms on and 100 msoff, device temperature changes r[r]

[6] J. Solis, S. Saukko, L. Kish, C. Granqvist, V. Lantto, Semiconductorgas sensors based on nanostructured tungsten oxide, Thin Solid Films391 (2001) 255–260.[7] D. Vincenzi, A. Butturi, V. Guidi, M. Carotta, G. Martinelli, V.Guarnieri, S. Brida, B. Margesin, F. Giaocemozzi, M. Zen, D. Giusti,G. So[r]

 Sự định hướng của tinh thểCác phương pháp phân tích cấu trúcCác phương pháp phân tích cấu trúc Structural studies were made by X-ray diffraction (XRD) using a Siemens D5000 diffractometer operating with CuKα radiation at grazing incidence. Standard data [10] were used to identify the diffraction[r]

Room-temperature semiconductor gas sensor based on nonstoichiometrictungsten oxide nanorod filmYong Shin Kim,a͒Seung-Chul Ha, Kyuwon Kim,b͒Haesik Yang,c͒Sung-Yool Choi, and Youn Tae KimElectronics and Telecommunications Research Institute, Daejeon 305-350, Republic of KoreaJoon T. ParkD[r]

Department of Mechanical Engineering, University of Wisconsin-Milwaukee,Milwaukee, WI 53211, USA.2Department of Mechanical Engineering and theTexas Materials Institute, University of Texas at Austin, Austin, TX 78712, USA.3Keck-II Center, Northwestern University, Evanston, IL 60208, USAAuthors’ cont[r]

[r]

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of polyaniline blend films, Sens. Actuators B 94 (2003) 46–52.[19] A.A. Athawale, S.V. Bhagwat, P.P. Katre, Nanocomposite of Pd – polyaniline as aselective methanol, Sens. Actuators B 114 (2006) 263–267.[20] H. Tai, Y. Jiang, G. Xie, J. Yu, X. Chen, Fabrication and gas sensitivity ofpolyanilin[r]

using Pd/ZnO nanorods. The same test was also carriedout by replacing ZnO nanorods with Al plate and thebreakdown voltage occurred at 1532 V with a currentdischarge of 65 μA (data not shown here). The resultsFigure 1 (a) Schematic diagram of the ZnO nanorod-based gassensor device. (b) SEM image of Z[r]