Surface modified silicon nano channel for urea sensing

... 2008Keywords: Nano- channel Urea BiosensorLithographyabstract Silicon nano- channels have been surface functionalized with the enzymeurease for biosensor applicationsto detect and quantify urea concentration. ... and Actuators B: Chemicaljournal homepage: www.elsevier.com/locate/snb Surface- modiﬁed silicon nano- channel for urea sensing Yu Chen, Xihua Wang, Mi Hong, Shyamsunder Erramilli, Pritiraj Mohanty∗Department ... device is nanofabricated from a silicon- on-insulator (SOI)wafer with a top down lithography approach. The differential conductance of silicon nano- channels canbe tuned for optimum performance...

Báo cáo khoa học: "A Modified Joint Source-Channel Model for Transliteration" ppt

... Sessions, pages 191–198,Sydney, July 2006.c2006 Association for Computational LinguisticsA Modified Joint Source -Channel Model for Transliteration Asif Ekbal Comp. Sc. & Engg. Deptt. ... English. The system has been evaluated and it has been observed that the modified joint source -channel model performs best with a Word Agreement Ratio of 69.3% and a Transliteration Unit ... The proposed modified joint source -channel model is similar to the model proposed by (Goto et. al., 2003) but it differs in the way the transliteration units and the contextual information are...

nanostructured oxides on porous silicon microhotplates for nh3 sensing

... Nanostructured oxides on porous silicon microhotplates for NH3 sensing R. Triantafyllopouloua,*, X. Illab, O. Casalsb, S. ... to WO3:Cr, for these operating conditions.Ó 2008 Elsevier B.V. All rights reserved.Keywords: Gas sensors; Porous silicon; Micro-hotplates; Nanostructured metal oxides; NH3 sensing 1. IntroductionThe ... suspended Porous Silicon micro-hotplates.3. ResultsCharacterization of the gas sensors was performed atisothermal mode of operation, by keeping constant thepower supplied to the heater. For the micro-hotplates...

The phenomenon of evaporative cooling from a humid surface as an alternative method for air-conditioning

... processes. Therefore, these systems based in the evaporative cooling are rarely used for cooling buildings. To reduce this risk, evaporative cooling is produced from humid surfaces, in such ... the surface and the air. Figure 26 shows the system behaviour in similar conditions to the ones established for the semi-indirect evaporative recover made of ceramic pipes introduced before. ... transferred to the water surface and transformed into evaporation latent heat, the dry bulb air temperature diminishes, while this loose of sensible heat is simultaneously compensated for the vapor absorption,...

Establishing a surface water quality monitoring network for the Mekong delta,Viet Nam

... Room for information unit • Qualified staffs • Places to organize seminars, training courses • Man-power to develop and maintain computer network Foreign partner will contribute: • Cost for ... 14ANNEX 1 Figure 1. Network of monitoring waterways for surface- water quality in MD 15Figure 2. Network of sampling points for surface- water quality in MD 16ANNEX 2 INTRODUCTION ... management for young entrepreneurs in the MD. CTU has cooperated with non-governmental organizations in the credit program for poor women, a program for rural development, and a program for environmental...

Sulfide assisted growth of silicon nano wires by thermal evaporation of sulfur powders

... which form silicon sulﬁdes by the reaction with silicon, canalso be used to assist the growth of SiNWs. Inprinciple, all of silicon compounds, such as silicon sulﬁde shown in this paper and silicon ... nanowires. This suggests that thenanowires were composed of silicon and silicon oxide as sheath. Actually, some SiNWs could beoxidized to be silicon oxide nanowires because ofthe low-vacuum ... corresponding nanowiresindicates that the nanowires were silicon. How-ever, oxygen could also be detected. The oxygen isconsidered to have come mainly from the surface oxidation of nanowires....

Tiny silicon nano wires synthesis on silicon wafers

... 71.55.Cn; 81.05.YsKeywords: Nano- wires; Synthesis; Silicon 1. IntroductionOne dimension nano- materials have stimulatedmuch interest for their potential applications in nano- electronics, optics, ... Physica E 24 (2004) 328–332Tiny silicon nano- wires synthesis on silicon wafersJunjie Niua, Jian Shaa,b, Yujie Jia, Deren Yanga,ÃaState Key Laboratory of Silicon Materials, Zhejiang University, ... minimum [18,19]. Recently Huet al. fabricated the silicon nanowires withdiameters of 10–30 nm sub-grow on the surface of large amorphous SiO2nanowires with diametersof 200–400 nm using ﬂoating-zone...

Electrical porous silicon chemical sensor for detection of organic solvents

... Carstensen, G. Hasse, Formation andapplication of porous silicon, Mater. Sci. Eng. R39 (2002) 93–139.[21] H.H. Okorn-Schmidt, Characterization of silicon surface preparationprocesses for advanced gate ... to what has been reported for silicon nanowires [29]and is strongly dependent on the surface charge.Fig. 11presentsasimplesimulationofthe modelvariablesover time for molecules acting as a ... the oxidized surface takes place.Similar considerations apply for acetonitrile, which has notbeen studied on oxidized surfaces but can be chemically ad-sorbed on clean silicon surfaces [31]....

Synthesis and characterization of semiconducting nanowires for gas sensing

... gas sensing behavior of ZnO nanowires.Fig. 3. Characteristics of In3O2nanowires: (a) SEM image of In3O2nanowires, (b) TEM image of nanowire 70 nm in width, and (c) ED pattern from the nanowire.G. ... ZnO nanowires: (a–c) variation of the size for the ZnO nanowires for different growth conditions, (d) TEM image of ZnO crystallinenanowire, (e) high-resolution TEM image of the hexagonal nanowire ... sen-sors with superior performance-NANOS4” STREP project no.001528. “Nanostructured semiconductors for chemical sens-ing” PRIN project 2004. “Quasi mono dimensional nanosensors for label free ultra...

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