Highly sensitive SERS quantification of organophosphorous chemical warfare agents: A major step towards the real time sensing in the gas phase

Lafuente, M. ; Pellejero, I. ; Sebastián, V. (Universidad de Zaragoza) ; Urbiztondo, M.A. (Universidad de Zaragoza) ; Mallada, R. (Universidad de Zaragoza) ; Pina, M.P. (Universidad de Zaragoza) ; Santamaría, J. (Universidad de Zaragoza)

Resumen: A surface-enhanced Raman scattering (SERS)-based sensor was developed for the label-free real-time gas phase detection of dimethyl methylphosphonate (DMMP); a surrogate molecule of the G-series nerve agents which are of particular concern due to its extreme toxicity, persistence and previous deployment. The SERS platform was designed using simple elements (Au nano-particles) coated with a citrate layer, and a self-assembly procedure that yields near- optimum distances among the nanoparticles. The citrate coating acts as an effective trap of the target molecules on the immediate vicinity of the Au nanoparticle surface under ambient conditions by reversible hydrogen bonding type interactions. For the first time, we have been able to detect sub-ppm concentrations of DMMP in gas phase (130 parts-per-billion), as might be found on potential emergency scenarios. The high sensitivity, simple preparation and reusability of the SERS platforms developed in this work open up the way for immediate detection of chemical warfare agents in realistic scenarios.

Idioma: Inglés

DOI: 10.1016/j.snb.2018.04.058

Año: 2018

Publicado en: SENSORS AND ACTUATORS B-CHEMICAL 267 (2018), 457-466
ISSN: 0925-4005

Factor impacto JCR: 6.393 (2018)

Categ. JCR: CHEMISTRY, ANALYTICAL rank: 6 / 84 = 0.071 (2018) - Q1 - T1
Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 2 / 61 = 0.033 (2018) - Q1 - T1
Categ. JCR: ELECTROCHEMISTRY rank: 4 / 26 = 0.154 (2018) - Q1 - T1

Factor impacto SCIMAGO: 1.389 - Condensed Matter Physics (Q1) - Electrical and Electronic Engineering (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Surfaces, Coatings and Films (Q1) - Materials Chemistry (Q1) - Metals and Alloys (Q1) - Instrumentation (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2013-49068-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2016-79419-R
Financiación: info:eu-repo/grantAgreement/ES/UZ/JIUZ-2016-TEC-07

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)