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Author Danesh, E. ♦ Ghaffarian, S.R. ♦ Molla-Abbasi, P.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Wearable sensors ♦ Sensor phenomena and characterization ♦ Gas detectors ♦ Polymer films ♦ Biosensors ♦ Thin film sensors ♦ Chemical sensors ♦ Carbon nanotubes ♦ Sensor arrays ♦ Conductive films
Abstract Novel non-fragile porous conductive nanocomposite vapor sensors with variant volume porosities and specific surface areas have been fabricated from PMMA and carbon nanoparticles. Sensing films were obtained by well known dry-cast non-solvent induced phase separation (NIPS) method. Porous composite structures have been characterized by SEM, BET and water evaporation methods. Response behavior of fabricated porous sensors toward various organic vapors in different concentrations were measured and compared to response of their conventional dense counterparts in dynamic mode. Both sensitivity and response speed of vapor sensors have been improved remarkably with introducing porosity to the sensing layer. Similar results were observed when nano-sized carbon black as conductive filler in composite was replaced with multiwall carbon nanotube. Improved characteristics of the sensor response were related to better sorption properties of sensing film due to increased porosity and specific surface area obtained by this method of thin film preparation. These porous sensitive layers showed non-fragility that particularly will be promising in fabrication of wearable sensors. Simplicity and versatility of both fabrication method and sensing mechanism of these porous conductive composite vapor sensors make them advantageous wherever sensing materials with low cost and high performance needed.
Description Author affiliation: Department of Polymer Engineering, Amirkabir University of Technology, Tehran, Iran 15875-4413 (Danesh, E.; Ghaffarian, S.R.; Molla-Abbasi, P.)
ISBN 9781424445486
ISSN 19300395
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-10-25
Publisher Place New Zealand
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 1.39 MB
Page Count 4
Starting Page 291
Ending Page 294

Source: IEEE Xplore Digital Library