Effect of wavelength and liquid on formation of Ag, Au, Ag/Au nanoparticles via picosecond laser ablation and SERS-based detection of DMMP

• Sree Satya Bharati Moram,
• Chandu Byram and
• Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1054–1069, doi:10.3762/bjnano.15.86

• detect chemical warfare agent (CWA) simulants such as methyl salicylate (a CWA simulant for sulfur mustard) and dimethyl methyl phosphonate (has some structural similarities to the G-series nerve agents) at different laser excitations (325, 532, and 633 nm). A notably higher SERS efficiency for CWA

• implications for developing more efficient and stable SERS substrates for chemical detection applications. Keywords: dimethyl methyl phosphonate; laser material interaction; metal nanoparticles; picosecond laser ablation; SERS; thiram; Introduction Metal nanoparticles (NPs) are versatile materials widely

• capable of trace detection. Dimethyl methyl phosphonate (DMMP) is commonly used as a less toxic simulant for sarin, a G-series nerve agent. DMMP can, in general, be used in making chemical weapons. Zheng et al. [30] reviewed various methods for DMMP detection, including mass-sensitive sensors, surface