gas sensors using hierarchical and hollow oxide nanostructures

... 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: ... the hierarchical structures enhanced both the gas response and the gas response speed simultaneously and substantially. Page 1 of 73 Accepted Manuscript 1...

Ngày tải lên: 19/03/2014, 16:48

... 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

... 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: 05/05/2014, 15:29

... 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

... 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

... photode- tectors and optical switches. Adv. Mater. 14:158–61 60. Comini E, Cristalli A, Faglia G, Sberveg- lieri G. 2000. Light enhanced gas sensing properties of indium oxide and tin dioxide sensors. Sensors ... properties of metal oxides (4, 12–14). Chemical and biological sensors having nanostructured metal oxides and espe- cially metal -oxide nanowires benefit from the co...

Ngày tải lên: 19/03/2014, 16:47

... 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

... 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

... 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

... 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