title: Graphene oxide as sensitive layer in Love-wave surface acoustic wave sensors for the detection of chemical warfare agent simulants.
abstract: A Love-wave device with graphene oxide (GO) as sensitive layer has been developed for the detection of chemical warfare agent (CWA) simulants. Sensitive films were fabricated by airbrushing GO dispersions onto Love-wave devices. The resulting Love-wave sensors detected very low CWA simulant concentrations in synthetic air at room temperature (as low as 0.2 ppm for dimethyl-methylphosphonate, DMMP, a simulant of sarin nerve gas, and 0.75 ppm for dipropylene glycol monomethyl ether, DPGME, a simulant of nitrogen mustard). High responses to DMMP and DPGME were obtained with sensitivities of 3087 and 760 Hz/ppm respectively. Very low limit of detection (LOD) values (9 and 40 ppb for DMMP and DPGME, respectively) were calculated from the achieved experimental data. The sensor exhibited outstanding sensitivity, good linearity and repeatability to all simulants tested. The detection mechanism is here explained in terms of hydrogen bonding formation between the tested CWA simulants and GO.
authors.affiliation: Instituto de Tecnologías Físicas y de la Información ITEFI-CSIC, Serrano 144, 28006 Madrid, Spain. Electronic address: i.sayago@csic.es.
authors.forename: Isabel
authors.initials: I
authors.lastname: Sayago
authors.affiliation: CCADET, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n A.P. 70-186 - Ciudad Universitaria, 04510 México D.F., Mexico. Electronic address: daniel.matatagui@ccadet.unam.mx.
authors.forename: Daniel
authors.initials: D
authors.lastname: Matatagui
authors.affiliation: Instituto de Tecnologías Físicas y de la Información ITEFI-CSIC, Serrano 144, 28006 Madrid, Spain. Electronic address: mj.fernandez@csic.es.
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Fernández
authors.affiliation: Instituto de Tecnologías Físicas y de la Información ITEFI-CSIC, Serrano 144, 28006 Madrid, Spain. Electronic address: joseluis.fontecha@csic.es.
authors.forename: José Luis
authors.initials: JL
authors.lastname: Fontecha
authors.affiliation: Department of Physics, Faculty of Engineering & Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom. Electronic address: izabela.jurewicz@surrey.ac.uk.
authors.forename: Izabela
authors.initials: I
authors.lastname: Jurewicz
authors.affiliation: Departamento de Química Física, Universidad de Zaragoza, 50009 Zaragoza, Spain. Electronic address: rosa@unizar.es.
authors.forename: Rosa
authors.initials: R
authors.lastname: Garriga
authors.affiliation: Instituto de Carboquímica ICB-CSIC, Miguel Luesma Castán 4, 50018 Zaragoza, Spain. Electronic address: edgar@icb.csic.es.
authors.forename: Edgar
authors.initials: E
authors.lastname: Muñoz
keywords: Acoustic wave gas sensor; Chemical warfare agent simulants; Graphene oxide; Love-wave sensors