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highly sensitive and selective ammonia gas sensor - solid state

highly sensitive and selective ammonia gas sensor - solid state

highly sensitive and selective ammonia gas sensor - solid state

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highly sensitive thin film nh3 gas sensor operating at room

highly sensitive thin film nh3 gas sensor operating at room

... composite-based gas sensors operated atroom temperature are still lacking.The NH3 gas sensors based on CNTs [25,26] and SnO2[27–31] have been extensively investigated. The SnO2-based gas sensors ... p-type semiconductor [12–15,25–28]. Comparingwith the CNTs-based NH3 sensor [27,29] and the SnO2-basedNH3 sensor [29–31] reported previously, as-synthesized com-posites SnO2/MWCNTs-based ... nm.Like semiconductor oxide gas sensors, the response of the com-posite gas sensors could relate with the reactivity and diffusionof gas molecules inside the gas- sensing layers [49]. Therefore,a...
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a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature

a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature

... nanocomposite thin films.3.4. Gas response and recovery characterizationFig. 6 shows the gas response of the ZnO-based gas sen-sors including a pure nano-crystalline ZnO film and the fourFe2O3–ZnO ... of the gas sensors based on: (a) 2% and (b) 4% Fe2O3–ZnOnanocomposites.Table 1 summarizes the sensor signal (response magnitude),response time and recovery time of the ZnO-based sensors ... enhance the gas sensing propertiesof the ZnO nanosensors, and the composition of Fe:Zn = 2%is the best for the Fe2O3–ZnO nanocomposite thin film gas sensors.5. Conclusion Gas sensors based...
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ammonia gas sensor based on electrosynthesized polypyrrole films

ammonia gas sensor based on electrosynthesized polypyrrole films

... incorpo-rated in gas sensors for the detection of ethanol gas [54], benzene,xylene and toluene [55].Other studies focused on ammonia gas sensors using polypyr-role as sensitive layer. Thus, an ammonia ... NH3vapors and (b) schematic drawing of the ammonia gas sensor. 2. Experimental2.1. Fabrication of gas sensorsThe gas sensors were fabricated using microsystem technolo-gies, and in particular ... 2008Keywords: Gas sensor Ammonia PolypyrroleElectrochemistryabstractIn this work, design and fabrication of micro -gas- sensors, polymerization and deposition of poly(pyrrole)thin films as sensitive...
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Báo cáo khoa học: Cleavage site analysis of a serralysin-like protease, PrtA, from an insect pathogen Photorhabdus luminescens and development of a highly sensitive and specific substrate pdf

Báo cáo khoa học: Cleavage site analysis of a serralysin-like protease, PrtA, from an insect pathogen Photorhabdus luminescens and development of a highly sensitive and specific substrate pdf

... and tert-butyl for Ser and Tyr. 4-( 2¢,4¢-Dimethoxyphenyl-Fmoc-aminomethyl)phenoxy (Rink amide), 2-chlorotrityl chloride and N-( 4-[ 4¢(dimethylamino)phenylazo]benzoyloxy)succini-mide (Dabcyl-OSu) ... Ac-EVYAAE-NH225.5a25.1andPa7 Ac-ELYLVE-NH234.0 28.9 22.0Pa8 Ac-ELYAVE-NH230.4 28.9 ndPa9 Ac-ELYLLE-NH236.3 28.9 25.0Pa10 Ac-ELYLAE-NH232.3 28.9 20.2Pa11 Ac-ELYALE-NH232.8 28.9 21.0Pa12 Ac-ELYAAE-NH228.4a28.8andaRetention ... AAEPa1 Ac-EVYLVE-NH232.1 26.2 22.0Pa2 Ac-EVYLLE-NH234.6 26.2 25.0Pa3 Ac-EVYLAE-NH230.6 26.2 20.2Pa4 Ac-EVYAVE-NH228.2 26.2 ndPa5 Ac-EVYALE-NH230.9 26.2 21.0Pa6 Ac-EVYAAE-NH225.5a25.1andPa7...
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crystalline structure, defects and gas sensor response

crystalline structure, defects and gas sensor response

... temperature and 300 8C) in order to better relate structural and gas- sensing properties.Sensors and Actuators B 93 (2003) 475–485*Corresponding author. Tel.: þ3 4-9 3 4-0 2 1-1 46; fax: þ3 4-9 3 4-0 2 1-1 48.E-mail ... understand the sensor response to NO2 and H2S of gas sensors based on differentlyannealed WO3. Thick-film gas sensors based on differentlyannealed WO3nanopowders (400 and 700 8C) were pre-pared ... SpainAbstractStructural and NO2 and H2S gas- sensing properties of nanocrystalline WO3powders are analysed in this work. Sensor response of thick-film gas sensors was studied in dry and humid air....
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gas sensor response of pure and activated wo3 nanoparticle

gas sensor response of pure and activated wo3 nanoparticle

... of operating temperature for as-deposited Al-activated WO3films exposed to 10 ppm H2S (right-hand scale), 5 ppm NO2(left-hand scale), and 100 ppm CO (left-hand scale). The lines are guide ... response of an as-deposited Au-activated WO3 sensor uponCO (50 and 100 ppm) and NO2(5 and 10 ppm) exposures at 700 K operatingtemperature.132 L.F. Reyes et al. / Sensors and Actuators B ... pure and activated as-depositednanocrystalline WO3sensors upon exposure to 10 ppm H2S at room-temperatureoperation. H2S injection and evacuation took place after 5 and 15 min, respec-tively.Fig....
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tio2 thin film gas sensor for monitoring ammonia

tio2 thin film gas sensor for monitoring ammonia

... the sensor measured inair and Ggis the conductance of the sensor in thepresence of the test gas. 3. Results and discussions3.1. Structure and microstructureStructure and the structure-related ... of the TiO2thin 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 ... sample, heater and temperature sensors are arranged with electrical con-nections. The gas inlet and the air admittance valves aremade at the base plate in order to inject the test gas and air. A...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf

DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf

... componentsalpha-Chlordane 406 510 3-7 1-9 gamma-Chlordane 406 510 3-7 4-2 trans-Nonachlor 440 3976 5-8 0-5 Chlorneb 206 267 5-7 7-6 Chlorobenzilate 324 51 0-1 5-6 Chlorpropham 213 10 1-2 1-3 Chlorothalonil 264 189 7-4 5-6 525. 2-3 013.2.1 ... 20 7-0 8-9 Benzo[a]pyrene 252 5 0-3 2-8 Benzo[g,h,i]perylene 276 19 1-2 4-2 Bromacil 260 31 4-4 0-9 Butachlor 311 2318 4-6 6-9 Butylate 317 200 8-4 1-5 Butylbenzylphthalate 312 8 5-6 8-7 Carboxin 235 523 4-6 8-4 2Chlordane ... 30 9-0 0-2 Ametryn 227 83 4-1 2-8 Anthracene 178 12 0-1 2-7 Atraton 211 161 0-1 7-9 Atrazine 215 191 2-2 4-9 Benz[a]anthracene 228 5 6-5 5-3 Benzo[b]fluoranthene 252 20 5-8 2-3 Benzo[k]fluoranthene 252 20 7-0 8-9 Benzo[a]pyrene...
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Tài liệu Báo cáo khoa học: PCR detection of nearly any dengue virus strain using a highly sensitive primer ‘cocktail’ ppt

Tài liệu Báo cáo khoa học: PCR detection of nearly any dengue virus strain using a highly sensitive primer ‘cocktail’ ppt

... (which detects both DENV-1 and DENV-2)were 2.0 and 0.9% for DENV-1 and DENV-2, respec-tively, and 1, 1.8, 4.4 and 3.4% for groups 2 (2G2P5),3 (1G3P6), 4 (1G4P217) and 5 (1G5P30), respectively,with ... DENV and human RNAPrimers were further tested with total RNA extractedfrom DENV-1 (Piura, Peru )-, DENV-2 (New Guinea C )-, DENV-3 (Asuncion, Paraguay )- or DENV-4 (Dominica,West Indies)-infected ... cocktail.DENV -1 DENV-2 DENV-3DENV-4501002003004005007501000M –H+H –H+H –H+HNTCM–H+H–H+H–H+H–H+HHDENVAB -1 –H +HDENV-2DENV-3DENV-4501002003004005007501000Fig. 6. Ten-primer...
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