| AC-conductance and capacitance measurements for ethanol vapor detection using carbon nanotube-polyvinyl alcohol composite based devices. | |
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MedLine Citation:
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PMID: 21449397 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We report the preparation of inexpensive ethanol sensor devices using multiwalled carbon nanotube-polyvinyl alcohol composite films deposited onto interdigitated electrodes patterned on phenolite substrates. We investigate the frequency dependent response of the device conductance and capacitance showing that higher sensitivity is obtained at higher frequency if the conductance is used as sensing parameter. In the case of capacitance measurements, higher sensitivity is obtained at low frequency. Ethanol detection at a concentration of 300 ppm in air is demonstrated. More than 80% of the sensor conductance and capacitance variation response occurs in less than 20 s. |
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Authors:
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Márcia W C C Greenshields; Michelle S Meruvia; Ivo A Hümmelgen; Neil J Coville; Sabelo D Mhlanga; Helder J Ceragioli; Jose C Rojas Quispe; Vitor Baranauskas |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of nanoscience and nanotechnology Volume: 11 ISSN: 1533-4880 ISO Abbreviation: J Nanosci Nanotechnol Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-03-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088195 Medline TA: J Nanosci Nanotechnol Country: United States |
Other Details:
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Languages: eng Pagination: 2384-8 Citation Subset: IM |
Affiliation:
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Group of Organic Optoelectronic Devices, Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-990 Curitiba - PR, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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