room-temperature semiconductor gas sensor based on nonstoichiometric
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 ... opportunity for tungsten oxide- based gas sensor development. In this letter, we report fab- rication of a MOS gas sensor, which entails drop coating of WO 2.72 nanorod solution on the Si bulk-mic...
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 ... opportunity for tungsten oxide- based gas sensor development. In this letter, we report fab- rication of a MOS gas sensor, which entails drop coating of WO 2.72 nanorod solution on the Si bulk-mic...
Ngày tải lên: 20/03/2014, 13:07
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
ammonia gas sensor based on electrosynthesized polypyrrole films
... 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 (b). 204 ... 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 notic...
Ngày tải lên: 19/03/2014, 16:47
semiconductor gas sensors based on nanostructured tungsten oxide
... vaporization of metal tungsten in a reactive atmosphere was used to produce UFP powder of WO for screen printing. 3 A drawback of the conventional semiconductor gas sensors is their operation at ... screen-printed films . Gas 3 deposition ᎏ i.e. evaporation in the presence of a gas so that well-defined crystalline precursors for film man- ufacturing are formed ᎏ was based on inductio...
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...
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
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 ad...
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
Báo cáo y học: "Gain of a 500-fold sensitivity on an intravital MR Contrast Agent based on an endohedral Gadolinium-Cluster-Fullerene-Conjugate: A new chance in cancer diagnostics"
... Gd concentrations. This modularly designed contrast agent represents a new tool for improved monitoring and evaluation of interventions at the gene transcription level. Also, a widespread monitoring ... Ligation reaction based on the Diels Alder Reaction with invers electron demand. [EP 06 012 414.6]. 6-10-2006. 46. Reppe W, Schlichting O, Klager K, et al. Cyclisierende Polymerisati...
Ngày tải lên: 26/10/2012, 09:07