Vidya Nand Singh

(Author)

Gas Sensing Properties of In2O3 and In2O3: Ag Nanoparticle LayersPaperback, 10 June 2010

Gas Sensing Properties of In2O3 and In2O3: Ag Nanoparticle Layers
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Print Length
184 pages
Language
English
Publisher
LAP Lambert Academic Publishing
Date Published
10 Jun 2010
ISBN-10
3838365402
ISBN-13
9783838365404

Description

Gas-sensing properties of oxide semiconductors improves by using then in nanocrystalline forms. The sensitivity of gas-sensor has also been modified by adding metals or metal oxides as catalytic agents. Using the In2O3 and Ag nanoparticles as the precursor; In2O3: Ag composite nanoparticle layers have been grown. It has been demonstrated that a decreasing particle size leads to an increased sensitivity and a decreased response time. At C2H5OH concentration of 1000 ppm in air and at an operating temperature of 400°C, sensitivity and response time of 325 and 8 s, respectively have been achieved in case of In2O3 nanoparticles with a size of 14 nm. With the addition of 15% silver, response time of 6 s and sensitivity of 436 has been obtained for 1000 ppm ethanol at 400°C. Ag2O nanoparticle draws electrons from the In2O3 layer and enhances the formation of electron-depleted layer. On exposure to a reducing gas, interfacial Ag2O is reduced to Ag, with a decrease or disappearance of the space-charge layer. Gas sensing response thus depends on the change in depletion layer in interface from Ag2O-In2O3 to accumulation layer in Ag-In2O3.

Product Details

Authors:
Vidya Nand SinghB R Mehta
Book Format:
Paperback
Country of Origin:
US
Date Published:
10 June 2010
Dimensions:
22.86 x 15.24 x 1.07 cm
ISBN-10:
3838365402
ISBN-13:
9783838365404
Language:
English
Location:
Saarbrucken
Pages:
184
Weight:
276.69 gm

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