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PRODUCT 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.
SIMILAR PRODUCTS
