Raman spectra evaluation of gold nanoparticles composite interaction with nerve ggent simulant

Raman spectroscopy is one of many reliable methods to detect chemicals' presence and traces in environment. In present study, we evaluate Raman detection towards dimethyl methyl phosphate (DMMP), a colorless organophosphate chemical on selected substrates and environment. The role of AuNPs in providing surface-enhanced Raman scattering signals and graphene oxide as interaction template are discussed in the interest of analysing various DMMP contaminations. Our study shows that DMMP's Raman modes were enhanced by gold nanoparticles (AuNPs) coated cellulose film indicating potential of this substrate. In aqueous measurement, the D band to G band intensity ratio of AuNP/graphene was seen to produce significant increase in sensitivity towards DMMP compared to graphene oxide dispersion. These Raman signatures can be used to understand molecules-substrate's surface interactions that will be beneficial to chemical and optical sensors development. The current system also shown the potential to identify 1000 ppm DMMP which is difficult by typical infrared spectroscopy.