Characterization of an array of Love-wave gas sensors developed using electrospinning technique to deposit nanofibers as sensitive layers.
The electrospinning technique has allowed that very different materials are deposited as sensitive layers on Love-wave devices forming a low cost and successful sensor array. Their excellent sensitivity, good linearity and short response time are reported in this paper. Several materials have been used to produce the nanofibers: polymers as Polyvinyl alcohol (PVA), Polyvinylpyrrolidone (PVP) and Polystirene (PS); composites with polymers as PVA+SnCl4; combined polymers as PS+Poly(styrene-alt-maleic anhydride) (PS+PSMA) and metal oxides (SnO2). In order to test the array, well-known chemical warfare agent simulants (CWAs) have been chosen among the volatile organic compounds due to their importance in the security field. Very low concentrations of these compounds have been detected by the array, such as 0.2 ppm of DMMP, a simulant of sarin nerve gas, and 1 ppm of DPGME, a simulant of nitrogen mustard. Additionally, the CWA simulants used in the experiment have been discriminated and classified using pattern recognition techniques, such as principal component analysis and artificial neural networks.
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain. Electronic address: daniel.matatagui@ccadet.unam.mx.
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Matatagui
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain.
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Fernández
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain.
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Fontecha
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain.
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Sayago
Instituto de Microelectrónica de Barcelona, CSIC, Campus UAB, 08193 Bellaterra, Spain.
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Gràcia
Instituto de Microelectrónica de Barcelona, CSIC, Campus UAB, 08193 Bellaterra, Spain.
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Cané
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain.
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Horrillo
Instituto de Tecnologías Físicas y de la Información (ITEFI), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 144, 28006 Madrid, Spain.
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Santos
D002619:Chemical Warfare Agents / Q000032:analysis*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D057230:Limit of Detection; D008298:Maleates / Q000737:chemistry; D008466:Mechlorethamine / Q000031:analogs & derivatives / Q000032:analysis; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D009943:Organophosphorus Compounds; D010087:Oxides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry; D011205:Povidone / Q000737:chemistry; D025341:Principal Component Analysis; D011409:Propylene Glycols; D012524:Sarin / Q000031:analogs & derivatives / Q000032:analysis*; D017971:Tin Compounds / Q000737:chemistry
D002619:Chemical Warfare Agents; D008298:Maleates; D009943:Organophosphorus Compounds; D010087:Oxides; D011108:Polymers; D011137:Polystyrenes; D011409:Propylene Glycols; D017971:Tin Compounds; C520889:poly(styrene-alt-maleic anhydride); C042175:dipropylene glycol monomethyl ether; D008466:Mechlorethamine; C041694:stannic chloride; D011142:Polyvinyl Alcohol; D012524:Sarin; D011205:Povidone
Chemical warfare agent; Electrospinning; Gas sensor; Love wave; Nanofibers; Sensor array