a new approach to gas sensing with nanotechnology by swati sharma, and marc madou philosophical...
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![Page 1: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/1.jpg)
A new approach to gas sensing with nanotechnology
by Swati Sharma, and Marc Madou
Philosophical Transactions AVolume 370(1967):2448-2473
May 28, 2012
©2012 by The Royal Society
![Page 2: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/2.jpg)
Three grains of a semiconductor oxide showing how the intergranular contact resistance comes about.
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 3: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/3.jpg)
Schematic of a gas-sensing reaction in (a) the compact layer and (b) the porous layer.
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 4: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/4.jpg)
Schematic models for grain-size effects (adapted from [23]).
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 5: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/5.jpg)
Schematic of the ethanol-sensing mechanism of vanadium oxide sensors coated with SnO2, TiO2 and Fe2O3 [34].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 6: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/6.jpg)
Transmission electron micrograph of tin oxide nanopowder [20].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 7: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/7.jpg)
Basic outline of the CVD technique [35].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 8: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/8.jpg)
(a) A macro-cylindrical gas sensor with a metal wire as a heating element [45].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 9: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/9.jpg)
A planer gas sensor with Pt microheaters on a suspended silicon nitride structure [45].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 10: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/10.jpg)
(a) Heat fluxes of a micromachined gas sensor [11].
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 11: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/11.jpg)
Effect of size reduction on materials and heaters of a gas sensor.
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society
![Page 12: A new approach to gas sensing with nanotechnology by Swati Sharma, and Marc Madou Philosophical Transactions A Volume 370(1967):2448-2473 May 28, 2012](https://reader035.vdocuments.net/reader035/viewer/2022062422/56649f305503460f94c4ba6c/html5/thumbnails/12.jpg)
SEM images displaying the diameter (a) and length (b) of a single suspended CNW. (c) Low-magnification SEM image displaying the adhesion of CNW onto C-MEMS electrode walls.
Swati Sharma, and Marc Madou Phil. Trans. R. Soc. A 2012;370:2448-2473
©2012 by The Royal Society