US EPA

4947109 

Journal Article 

Graphene oxide as sensitive layer in Love-wave surface acoustic wave sensors for the detection of chemical warfare agent simulants 

Sayago, I; Matatagui, D; Fernández, MJ; Fontecha, JL; Jurewicz, I; Garriga, R; Muñoz, E 

2016 

1 

Talanta
ISSN: 0039-9140
EISSN: 1873-3573 

148 

393-400 

English 

26653465 

10.1016/j.talanta.2015.10.069 

WOS:000366786400050 

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. 

Graphene oxide; Acoustic wave gas sensor; Love-wave sensors; Chemical warfare agent simulants