95461 20210902121608.0 doi 10.1016/j.jhazmat.2019.121279 sideral 114704 ART-2020-114704 eng Lafuente, Marta Universidad de Zaragoza (orcid)0000-0003-2660-3726 Gas phase detection of chemical warfare agents CWAs with portable Raman 2020 Access copy available to the general public Unrestricted The development of SERS substrates for chemical detection of specific analytes requires appropriate selection of plasmonic metal and the surface where it is deposited. Here we deposited Ag nanoplates on three substrates: i) conventional SiO2/Si wafer, ii) stainless steel mesh and iii) graphite foils. The SERS enhancement of the signal was studied for Rhodamine 6 G (R6 G) as common liquid phase probe molecule. We conducted a comprehensive study with ¿ = 532, 633 and 785 nm on all the substrates. The best substrate was investigated, at the optimum laser 785 nm, for gas phase detection of dimethyl methyl phosphonate (DMMP), simulant of the G-series nerve agents, at a concentration of 2.5 ppmV (14 mg/m3). The spectral fingerprint was clearly observed; with variations on the relative intensities of SERS Raman bands compared to bulk DMMP in liquid phase reflects the DMMP-Ag interactions. These interactions were simulated by Density Functional Theory (DFT) calculations and the simulated spectra matched with the experimental one. Finally, we were detected the characteristics DMMP fingerprint with hand-held portable equipment. These results open the way for the application of SERS technique on real scenarios where robust, light-weight, miniaturized and simple to use and cost-effective tools are required by first responders. info:eu-repo/grantAgreement/ES/UZ-DGA/T57-17R-P info:eu-repo/grantAgreement/ES/MICINN/CTQ2013-49068-C2-1-R info:eu-repo/grantAgreement/ES/MINECO/CTQ2016-79419-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 10.588 2020 ENVIRONMENTAL SCIENCES 10 / 273 = 0.037 2020 Q1 T1 ENGINEERING, ENVIRONMENTAL 4 / 53 = 0.075 2020 Q1 T1 2.033 2020 Environmental Chemistry 2020 Q1 Environmental Engineering 2020 Q1 Waste Management and Disposal 2020 Q1 Pollution 2020 Q1 Health, Toxicology and Mutagenesis 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Sanz, Diego (orcid)0000-0003-0685-6822 Urbiztondo, Miguel (orcid)0000-0002-4931-1358 Santamaría, Jesús Universidad de Zaragoza (orcid)0000-0002-8701-9745 Pina, María Pilar Universidad de Zaragoza (orcid)0000-0001-9897-6527 Mallada, Reyes Universidad de Zaragoza (orcid)0000-0002-4758-9380 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 384 (2020), 121279 [8 pp.] J. hazard. mater. Journal of Hazardous Materials 0304-3894 1926034 http://zaguan.unizar.es/record/95461/files/texto_completo.pdf Postprint 367253 http://zaguan.unizar.es/record/95461/files/texto_completo.jpg?subformat=icon icon Postprint https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072972065&doi=10.1016%2fj.jhazmat.2019.121279&partnerID=40&md5=07a003b199fbcc90c6ddf349c3f080c5 Texto completo de la revista oai:zaguan.unizar.es:95461 articulos driver 2021-09-02-08:39:16 ARTICLE