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|Type:||Artigo de evento|
|Title:||Gas And Pressure Sensors Based On Multi-wall Carbon Nanotubes: Study Of Sensing Mechanisms|
De Bica Moraes M.A.
|Abstract:||Mechanisms of gas sensing in sensors based on multi-wall carbon nanotubes decorated by Ti nanoparticles have been studied. Tests were performed with N 2, Ar and O 2 at low temperatures. Chemi-resistor sensor configurations with supported and suspended nanotubes were tested. Contributions from two gas sensing mechanisms (chemical and electrothermal) were shown to depend strongly on a sensor configuration. For suspended nanotubes, their heating by Joule effect results in much stronger and faster sensor response to oxygen. Oxygen detection with high sensitivity in this case was achieved at room temperature. Copyright © 2010 American Scientific Publishers All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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