gas sensors using hierarchical and hollow oxide nanostructures overview
gas sensors using hierarchical and hollow oxide nanostructures overview
... the hollow oxide structures are very promising for highly sensitive and fast responding gas sensor materials. Accepted Manuscript Title: Gas Sensors using Hierarchical and Hollow Oxide Nanostructures: ... date: 13-4-2009 Please cite this article as: J H. Lee, Gas Sensors using Hierarchical and Hollow Oxide Nanostructures: Overview, Sensors and Actua...
Ngày tải lên: 19/03/2014, 16:48
gas sensors using hierarchical and hollow oxide nanostructures
... 2009 Keywords: Hierarchical nanostructures Hollow structures Oxide semiconductor gas sensors Gas response Gas response kinetics abstract Hierarchical and hollow oxide nanostructures are very promising gas ... focus on gas sensors using hierarchical and hollow oxide nanostructures. In this paper, syn- thetic routes and gas sensing characteristics...
Ngày tải lên: 19/03/2014, 16:48
semiconductor gas sensors based on nanostructured tungsten oxide
... between a gas and a solid mainly takes place on the surface and hence the amount of atoms residing at grain surfaces and inter- faces is critical for controlling the properties of the gas sensor. ... and particle growth in a gas stream. Atmospheric air was used as reactive and cooling gas. After evacuation of the UFP formation chamber, a N gas stream of 5 l min y1 and an...
Ngày tải lên: 20/03/2014, 13:07
comparison of single and binary oxide moo3, tio2 and wo3 sol – gel gas sensors
... 276±280 4.4. Carbon monoxide (CO) and nitrogen dioxide (NO 2 ) gas sensing TiO 2 had a negligible response to CO compared with WO 3 and MoO 3 . MoO 3 and WO 3 showed promising CO and NO 2 results. ... dioxide (TiO 2 ), WO 3 , and MoO 3 single metal oxide based gas sensors was conducted. Process variables such as solution concentration, deposition parameters, gelling time, an...
Ngày tải lên: 19/03/2014, 16:47
conduction model of metal oxide gas sensors
... real world gas sensors. Keywords: metal oxide, gas sensors, conduction model 1. Introduction Metal oxides in general and SnO 2 , in particular, have attracted the attention of many users and scientists interested ... scientists interested in gas sensing under atmospheric condi- tions. SnO 2 sensors are the best-understood prototype of oxide- based gas sensors. Nevertheless...
Ngày tải lên: 19/03/2014, 16:47
detection of organic gases using tio2 nanotube - based gas sensors
... Metal -oxide semiconductors such as SnO 2 , TiO 2 , WO 3 and ZnO are extensively used as gas sensors owing to their sensitive conductivity changes upon gas reaction and adsorption. SnO 2 and ... particle packing density, pore size distribution, and particle size and shape for detecting large sized organic gas molecules. Keywords; Organic gas, Gas sensor, TiO 2 n...
Ngày tải lên: 19/03/2014, 16:47
glucose - mediated hydrothermal synthesis and gas sensing characteristics of wo3 hollow microspheres
... H. Lee, Gas sensors using hierarchical and hollow oxide nanostructures: overview, Sens. Actuators B. 140 (2009) 313–336. [5] Q. Zhao, Y. Gao, X. Bai,C.Wu,Y. Xie,FacilesynthesisofSnO 2 hollow nanospheres and ... the effective gas diffusion (Fig. 5). The gas response was improved fur- Fig. 7. Dynamic sensing transients of (a) R30-RH and (b) R30 sensors and (c) gas...
Ngày tải lên: 19/03/2014, 16:48
h2s sensors based on tungsten oxide nanostructures
... www.sciencedirect.com Sensors and Actuators B 128 (2008) 488–493 H 2 S sensors based on tungsten oxide nanostructures Chandra Sekhar Rout, Manu Hegde, C.N.R. Rao ∗ Chemistry and Physics of Materials ... using metal oxide nanostructures. We were interested in developing sensors for H 2 S using metal oxide nanostruc- tures, since H 2 S is a toxic gas used in chemical la...
Ngày tải lên: 19/03/2014, 16:48
influence of binders on the sensing and electrical characteristics of wo3-based gas sensors
... ambient gas conditions. The sensitivity scale is shown in left and right axes for NO gas and other gases, respectively. x Sensors fabricated with binders show better selectivity to NO gas. x sensing ... gas since it provides a reducing gas ambience. However, the response of WO films to CO 3 Ž gas is very small compared with that to NO gas Note the x differences in ambient...
Ngày tải lên: 20/03/2014, 13:04
low - level detection of ethanol and h2s with temperature - modulated wo3 nanoparticle gas sensors
... for the sen- sor and the investigated gases [15–18]. This method requires a very simple measurement system and improves the selec- tivity and sensitivity of sensors as each gas has a character- istic ... sublimation of the tungsten oxide layer occurred. The gas flow transported the tungsten oxide vapour upwards and as the vapour became cooler, first oxide molecular clusters...
Ngày tải lên: 20/03/2014, 13:04