Novel approaches towards highly selective self-powered gas sensors
| Autor: | Andreas Waag, Leonhard Mayrhofer, Lorenzo Caccamo, Francisco Hernandez-Ramirez, Michael Moseler, Cristian Fàbrega, Winfried Daum, Martin W. G. Hoffmann, Hao Shen, G. Lilienkamp, Olga Casals, Alaaeldin Gad, Joan Daniel Prades |
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| Přispěvatelé: | Institut de Recerca en Energía de Catalunya, Publica |
| Předmět: |
Electronic structure
Nanostructure Materials science Energies [Àrees temàtiques de la UPC] High selectivity Nanotechnology semiconductors Signal gas sensor Ionization of gases Nano-devices Semiconductor materials Lead (geology) Selective detection Self-powered Electronic engineering Interfaces (materials) integrated nanodevices Engineering(all) self-powered business.industry High power consumption self assembled monolayers selectivity General Medicine Gas detectors Design approaches Highly selective Detectors de gasos Power (physics) Catalyst selectivity Semiconductor Semiconductors Power consumption Chemical sensors Semiconductor gas sensors Current limitation Gases business Integrated gas sensors |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Dipòsit Digital de la UB Universidad de Barcelona |
| Popis: | The prevailing design approaches of semiconductor gas sensors struggle to overcome most of their current limitations such as poor selectivity, and high power consumption. Herein, a new sensing concept based on devices that are capable of detecting gases without the need of any external power sources required to activate interaction of gases with sensor or to generate the sensor read out signal. Based on the integration of complementary functionalities (namely; powering and sensing) in a singular nanostructure, self-sustained gas sensors will be demonstrated. Moreover, a rational methodology to design organic surface functionalization that provide high selectivity towards single gas species will also be discussed. Specifically, theoretical results, confirmed experimentally, indicate that precisely tuning of the sterical and electronic structure of sensor material/organic interfaces can lead to unprecedented selectivity values, comparable to those typical of bioselective processes. Finally, an integrated gas sensor that combine both the self-powering and selective detection strategies in one single device will also be presented. © 2015 Published by Elsevier Ltd. |
| Databáze: | OpenAIRE |
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