AP4.3 - Silver nanoplates on graphite substrates for ultrasensitive and label free Surface-Enhanced Raman Scattering (SERS) based detection of organophosphorous nerve agents in gas phase
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- Applications 4 - Safety
- Author(s)
- M. Pilar Pina, M. Lafuente, D. Sanz, R. Mallada, J. Santamaria - Nanoscience Institute of Aragon, University of Zaragoza, Department of Chemical & Environmental Engineering, Zaragoza (Spain), M. Urbiztondo - Centro Universitario de la Defensa de Zaragoza, Zaragoza (Spain)
- Pages
- 406 - 407
- DOI
- 10.5162/IMCS2018/AP4.3
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
A surface-enhanced Raman scattering (SERS)-based sensor has been developed for the label-free real-time gas phase detection of dimethyl methylphosphonate (DMMP); a surrogate molecule of the Gseries nerve agents which are of particular concern due to its extreme toxicity, persistence and previous deployment. In particular, SERS substrates based on high density Ag nanoplates (LSPR at 700 nm) monolayers on graphite have been straightforwardly attained by electrostatically-driven adsorption technique. Unlike Au based counterparts, SERS measurements suggest the chemisorption of DMMP molecules to the Ag nanoplate surface, eventually leading to photoinduced decomposition products. These SERS substrates have demonstrated the capability for the reliable identification of DMMP in gas phase at 2.5 ppmV, with the advantages of simple operation and low cost.