Highly sensitive SERS quantification of organophosphorous chemical warfare agents: a major step towards the real time sensing in the gas phase
| Autor: | Jesus Santamaria, M. Pilar Pina, Victor Sebastian, Ismael Pellejero, M.A. Urbiztondo, Reyes Mallada, Marta Lafuente |
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| Přispěvatelé: | Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. INAMAT2 - Institute for Advanced Materials and Mathematics, Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. InaMat - Institute for Advanced Materials |
| Rok vydání: | 2018 |
| Předmět: |
Chemical Warfare Agents
Sub-ppm limit of detection Materials science Nanoparticle Nanotechnology Gas phase 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences symbols.namesake chemistry.chemical_compound Coating Neurotoxic agents Materials Chemistry Molecule Electrical and Electronic Engineering Instrumentation Reusability SERS Dimethyl methylphosphonate Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Real time detection 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry symbols engineering 0210 nano-technology Raman scattering Facile and reproducible fabrication |
| Zdroj: | Academica-e. Repositorio Institucional de la Universidad Pública de Navarra instname Academica-e: Repositorio Institucional de la Universidad Pública de Navarra Universidad Pública de Navarra |
| Popis: | 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. Financial support from MICINN (CTQ2013-49068-C2-1-R; CTQ2016-79419-R) and CUD (UZCUD2016-TEC-07) is gratefully acknowledged. CIBER-BBN is an initiative funded by the VI National R&D&i Plan 2008-2011 financed by the Instituto de Salud Carlos III with assistance from the European Regional Development Fund. |
| Databáze: | OpenAIRE |
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