Picosecond Laser-Ablated Nanoparticles Loaded Filter Paper for SERS-Based Trace Detection of Thiram, 1,3,5-Trinitroperhydro-1,3,5-triazine (RDX), and Nile Blue

Abstract

Recently, filter paper (FP)-based surface-enhanced Raman scattering (SERS) substrates have stimulated significant attention owing to their promising advantages such as being low-cost, easy to handle, and practically suitable for real-field applications in comparison to the solid-based substrates. Herein, a simple and versatile approach of laser-ablation in liquid for the fabrication of silver (Ag)-gold (Au) alloy nanoparticles (NPs). Next, the optimization flexible base substrate (sandpaper, printing paper, and FP) and the FP the soaking time (5–60 min) was studied. Further, the optimized FP with 30 min-soaked SERS sensors were exploited to detect minuscule concentrations of pesticide (thiram-50 nM), dye (Nile blue-5 nM), and an explosive (RDX-1,3,5-Trinitroperhydro-1,3,5-triazine-100 nM) molecule. Interestingly, a prominent SERS effect was observed from the Au NPs exhibiting satisfactory reproducibility in the SERS signals over ~1 cm2 area for all of the molecules inspected with enhancement factors of ~105 and relative standard deviation values of <15%. Furthermore, traces of pesticide residues on the surface of a banana and RDX on the glass slide were swabbed with the optimized FP substrate and successfully recorded the SERS spectra using a portable Raman spectrometer. This signifies the great potential application of such low-cost, flexible substrates in the future real-life fields.

New aspects of femtosecond laser ablation of Si in water: a material perspective

“…Studies on ultrafast laser ablation of different types of materials in a liquid medium reveal wide variations among colloidal nanoparticles and structures. In this connection, our earlier studies on laser ablation of metals (Au) [64], semiconductors (GaAs, Si) [12,65], and dielectrics/insulators (HfO 2 ) [11] TEM images of nanoparticles generated from ultrafast laser ablation of dielectric (HfO 2 ) [11], semiconductor (GaAs) [12], and metal (Au) [64] targets in liquid medium. demonstrated significant effects of target material on the laser ablation process.…”

“…Figure 2. TEM images of nanoparticles generated from ultrafast laser ablation of dielectric (HfO 2 )[11], semiconductor (GaAs)[12], and metal (Au)[64] targets in liquid medium.…”

Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application

“…Laser-induced generation of alloy and coreshell nanoparticles by ablation of multilayer films was previously investigated by Amendola et al [34,35]. Alternatively, alloys of plasmonic/magnetic or plasmonic/plasmonic metals could also be used [25,29,36]. Nanosecond laser ablation yields higher relative concentrations of core-shell nanoparticles than picosecond ablation due to differences in laser radiation-plasma plume interaction time frames [35].…”

Deep Learning Enabled SERS Identification of Gaseous Molecules on Flexible Plasmonic MOF Nanowire Films

“…In recent years, filter paper-based SERS substrates have attracted much attention due to their advantages of high flexibility and portability with low cost. − Benefiting from the capillary action induced by the microfiber network, , paper-based SERS substrates were mainly applied in the detection of liquid targets in previous works. , Meanwhile, in contrast to silicon wafer and glass slide, the paper consisted of a microfiber network and also provides a natural microchannel for gas transport, , which is perfectly compatible with AgNWs@MOF materials for much better SERS detection of gaseous analyte.…”