Label free electrochemical immunoaffinity sensor based on impedimetric method for pesticide detection

... No. 3, 664 – 670 Full Paper H. V. Tran et al. Label- Free Electrochemical Immunoaffinity Sensor Based on Impedimetric Method for Pesticide Detection H. V. Tran, a S. Reisberg, a B. Piro,* a T. ... www.electroanalysis.wiley-vch.de 669 Electrochemical Immunoaffinity Sensor for Pesticide Detection film resistance R f associated to ion diffusion is expected to d...

Ngày tải lên: 02/07/2014, 14:14

... 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. Conclusion Gas sensors based on Fe 2 O 3 –ZnO nanocomposites ... 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...

Ngày tải lên: 19/03/2014, 16:47

... responses obtained for each ammonia concentrations, we can plot the variation of the slope versus ammonia concentrations. Fig. 6b represents the evolution of the slope versus the ammonia concentration. ... realised on the ammonia detection studies using PPy -based gas sensors [40,41]. 3.7. Comparison with other works Before this study, other authors used conducting polymer films to deve...

Ngày tải lên: 19/03/2014, 16:47

... 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 sensor with LPG concentration. 4. Conclusions In ... p-polyaniline/n-TiO 2 heterojunction at various concentrations of LPG (a) in air, (b) 0.04 vol%, (c) 0.06 vol%, (d) 0.1 vol% and (e) 0.12vol% LPG. is concluded that th...

Ngày tải lên: 20/03/2014, 13:07

... 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 ... n-type semiconductor. 6–8 Current in n-type MOS sensors is carried by conduction band electrons, and adsorbates formed by at- mospheric oxygen at a grain boundary capture the e...

Ngày tải lên: 20/03/2014, 13:07

... ad- dition, other volatile organic compounds such as toluene, n-heptane, and acetone were also possible to detect at low concentration less than 5 ppm at room temperature. For porous WO 2.72 -based sensors, ... with the conventional space charge model. One of the conceivable mechanisms is the adverse effect of adsorbed analytes on the mobility of free charge carriers. The number of co...

Ngày tải lên: 20/03/2014, 13:07

... Nitrogen adsorption(+)–desorption(᭺ ) isotherms and BJH pore size distribution curves for mesoporous WO 3 calcined at 250 ◦ C for 5 h. the sensor decreased. The time response of WO 3 sensors, which ... sensitivity of WO 3 sensors for the concentration of 3 ppm NO 2 ,WO 3 sensors were maintained at various temperatures from 35 to 100 ◦ C. Fig. 5 shows that WO 3 sensors respond to turni...

Ngày tải lên: 20/03/2014, 13:07

... infrastructure based on honeycomb tes- sellation and the protocol based on it, hexagonal cell -based data dissemination (HexDD). HexDD is a geographical routing protocol based on this virtual ... case scenarios for each protocol, which is considered in the calculations. HexDD: In case of HexDD, upon the detection of a new event, the sensor node sends the sensor reading to...

Ngày tải lên: 20/06/2014, 20:20

... nanoparticles for dissociation of H 2 molecules on metal-semiconduc- tor interface. Ionized hydrogen atoms (protons), can form electric interface double layer with free electrons in the semiconductor, ... research on n ew H 2 sensors has been well sti- mulated. Sensors based on semiconductor Schottky bar- riers principally exceed in sensitivity over the best results reported by se...

Ngày tải lên: 21/06/2014, 01:20

... working state conversion is necessary to save energy for WSMN, but it also increase the difficulty for predicting energy con- sumption. In traditional sensor node, the energy is mainly consumed on receiving ... prediction mechanism dramatically reduces the overall information needed for balancing energy consumption. (3) We propose an adaptive reliable routing based on cluster hier...

Ngày tải lên: 21/06/2014, 17:20