ammonia gas sensor based on electrosynthesized polypyrrole films
ammonia gas sensor based on electrosynthesized polypyrrole films
... we can plot the variation of the slope versus ammonia concentrations. Fig. 6b represents the evolution of the slope versus the ammonia concentration. Above concentrations of 500 ppm, we noticed ... evolution of the electrical signal when Fig. 6. Sensor s electrical responses to various ammonia concentrations (a). Slope of the gas sensor s electrical response vs. NH 3 concentrations...
Ngày tải lên: 19/03/2014, 16:47
a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature
... of the gas sensor based on 2% Fe 2 O 3 –ZnO nanoparticle. 3.5. Reproducibility of gas sensor based on 2% Fe 2 O 3 –ZnO nanoparticles Fig. 7 shows the reproducibility of the sensor based on 2% Fe 2 O 3 –ZnO ... the gas sensing properties of the ZnO nanosensors, and the composition of Fe:Zn = 2% is the best for the Fe 2 O 3 –ZnO nanocomposite thin film gas sensors. 5. C...
Ngày tải lên: 19/03/2014, 16:47
room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film
... Room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film Yong Shin Kim, a͒ Seung-Chul Ha, Kyuwon Kim, b͒ Haesik Yang, c͒ Sung-Yool Choi, and Youn Tae Kim Electronics and ... sensor systems in the cost-conscious gas sensor market. Nanosized tungsten oxide particles have been found use- ful in fabricating gas sensors for the detection of ni...
Ngày tải lên: 20/03/2014, 13:07
room-temperature semiconductor gas sensor based on nonstoichiometric
... Room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film Yong Shin Kim, a͒ Seung-Chul Ha, Kyuwon Kim, b͒ Haesik Yang, c͒ Sung-Yool Choi, and Youn Tae Kim Electronics and ... sensor systems in the cost-conscious gas sensor market. Nanosized tungsten oxide particles have been found use- ful in fabricating gas sensors for the detection of ni...
Ngày tải lên: 20/03/2014, 13:07
sensitivity properties of a novel no2 gas sensor based on mesoporous wo3 thin film
... WO 3 ;NO 2 gas sensor; Sol–gel process 1. Introduction The detection of NO 2 is important for monitoring environ- mental pollution resulting from combustion or automotive emissions [1]. Existing gas sensor ... elec- trochromic devices, selective catalysts and gas sensors [6]. WO 3 is an n-type semiconductor whose electron concen- tration is determined mainly by the concentration of s...
Ngày tải lên: 20/03/2014, 13:07
room temperature liquefied petroleum gas (lpg) sensor based on p - polyaniline n - tio2 heterojunction
... LPG. is concluded that the gas response is a function of LPG concentra- tion. The gas response increased from 15 to 63% with an increase in concentration of LPG from 0.04 to 0.1 vol%. The maximum gas response ... p-polyaniline/n-TiO 2 heterojunction at a fixed voltage of +2 V and at a concentration of 0.1 vol% LPG. Fig. 7. Variation of response and recovery time of the heterojunction se...
Ngày tải lên: 20/03/2014, 13:07
highly sensitive and selective ammonia gas sensor - solid state
Ngày tải lên: 19/03/2014, 16:48
semiconductor gas sensors based on nanostructured tungsten oxide
... consumption 15 and miniaturized low-power gas sensors have been developed with the sensitive layer on a micro-hotplate wx 16 . Obviously, it would be desirable for many applica- tions if the sensor ... diffraction peaks from the substrate. few large ones. Clearly, the SEM data are consistent with the information gained from X-ray diffraction. 4. Gas sensing properties The strength of...
Ngày tải lên: 20/03/2014, 13:07
xps studies of active elements surface of gas sensors based on wo3nanoparticles
... work conditions important is the exploration of the state of sensor s surface after long contact with air at room temperature and influence of short-time anneal. We synthesized nanodisperse nonstoichiometric ... tungsten oxides, which demonstrated high sensor response to molecu- lar hydrogen and rare gases at room temperature. Earlier the effect of sensitivity to rare gases at physical adso...
Ngày tải lên: 20/03/2014, 13:12
influence of polymerization temperature on nh3 response of pani tio2 thin film gas sensor
... tested gases, and the sensor showed very weak responses to CO and H 2 . Based on this observation, it is believed that the sensor exhibits high selectivity to NH 3 . In addition, the response of ... an in-situ self-assembly approach for NH 3 gas- sensing application, and the effect of polymerization temperature on the gas response of the PANI/TiO 2 thin film gas sensor was inv...
Ngày tải lên: 20/03/2014, 13:04