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NH3 sensing with self-assembled ZnO-nanowire μHP sensors in isothermal and temperature-pulsed mode
Shao, Feng; Fan, Jiandong; Hernández Ramírez, Francisco; Fábrega, Cristian; Andreu Arbella, Teresa; Cabot i Codina, Andreu; Prades García, Juan Daniel; López, Núria (López Alonso); Udrea, F.; De Luca, A.; Ali, Syed Zeeshan; Morante i Lleonart, Joan Ramon
Universitat de Barcelona
Dielectrophoretic alignment is found to be a simple and efficient method to deposit the solution prepared ZnO nanowires onto micro hot plate substrates. Due to the strong surface effects, positive temperature coefficient for resistance was encountered with ZnO nanowires in the high temperature range (>250 degrees C). The response to ammonia (NH3) was evaluated in isothermal and temperature-pulsed operation mode; the relative higher response observed in the latter case demonstrates that the use of this methodology is a good strategy to improve the performance of metal oxide sensors based on nanomaterials. Here, we evaluate the response to NH3 and qualitatively describe the sensing mechanism in temperature-pulsed mode, highlighting the main differences compared to the standard isothermal methodology.
Amoníac
Òxid de zinc
Silici
Semiconductors
Ammonia
Zinc oxide
Silicon
Semiconductors
cc-by-nc-nd (c) Elsevier B.V., 2016
info:eu-repo/semantics/embargoedAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es
Artículo
info:eu-repo/semantics/acceptedVersion
Elsevier B.V.
         

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