Raman Spectra Evaluation of Gold Nanoparticles Composite Interaction with Nerve Agent Simulant Academic Article uri icon

abstract

  • Raman spectroscopy is one of many reliable methods to detect chemicals’ presence and traces in the environment. Raman enhancement for organophosphorus nerve agents is crucial considering its lethality in low concentration. In the present study, we evaluate Raman detection towards dimethyl methyl phosphate (DMMP), a colorless organophosphate chemical on selected substrates and environments. The role of AuNPs in providing surface-enhanced Raman scattering signals and graphene oxide as interaction templates 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 the potential of this substrate. In aqueous measurement, the D band to G band intensity ratio of AuNP/graphene was seen to produce a significant increase in sensitivity towards DMMP compared to graphene oxide dispersion. These Raman signatures can be used to understand molecules-substrate surface interactions that will be beneficial to chemical and optical sensor development. The current system also shows the potential to identify 1000 ppm DMMP which is difficult by typical infrared spectroscopy.

publication date

  • 2025

number of pages

  • 10

start page

  • 63

end page

  • 73

volume

  • 32

issue

  • 1