Controllable In-Situ Growth of Silver Nanoparticles on Filter Paper for Flexible and Highly Sensitive SERS Sensors for Malachite Green Residue Detection

Abstract

In this work, a series of highly flexible and sensitive surface-enhanced Raman scattering (SERS) substrates were fabricated by the in-situ growth of silver nanoparticles (AgNPs) on polydopamine (PDA) templated filter papers (FPs), based on mussel-inspired surface chemistry. The obtained FP@PDA@AgNPs strips exhibited high sensitivity and reproducibility with Rhodamine 6G (R6G) probe molecules, with a calculated detection limit of approximately 10−10 M. More critically, these FP@PDA@AgNPs strips could be used as outstanding flexible SERS sensors to quickly collect and detect malachite green (MG) residues on fish scales, crab shells and shrimp skins by a swabbing extraction method. The detection limits for MG residues were calculated to be approximately as low as 0.04635 pg/cm2, 0.06952 pg/cm2 and 0.09270 pg/cm2, respectively. This facile and efficient strategy could to be utilized as a universal approach to fabricating a variety of flexible, cheap and portable SERS sensors for surface contamination analysis, and has great potential in the environmental scientific analysis and food safety monitoring fields.

Recent progresses on paper‐based triboelectric nanogenerator for portable self‐powered sensing systems

“…After washing and drying, AgNPs growth on the paper. 56 The second method is polymerization, by which polymer monomers can form hydrogen bonds with paper. In 2019, Li et al soaked and stirred an origami folding paper in pyrrole monomer solution with ammonium persulfate as the oxidant.…”

“…As shown in Figure 3A, a filter paper pretreated with polypolyamine (PDA) was immersed into the [Ag (NH 3 ) 2 ] + solution and stirred for 12 hours with a 100 to 200 r min −1 stirring speed. After washing and drying, AgNPs growth on the paper 56 . The second method is polymerization, by which polymer monomers can form hydrogen bonds with paper.…”

“…A, Schematic diagram and scanning electron microscope images of the preparation FP@PDA@AgNPs stripes. 56 B, Fabrication process of PPy origami by polymerization. Reproduced with permission: Copyright 2019, Wiley 57 .…”

Flexible Surface‐Enhanced Raman Scattering Substrates: A Review on Constructions, Applications, and Challenges

“…In recent years, researchers have demonstrated that paper and other flexible films decorated with plasmonic nanoparticles could be developed for flexible SERS substrate and directly used to swab the analytes. [ 44,125,126 ] It is necessary to identify that the surface roughness of conventional cellulose films would influence the uniformity of SERS activity. To solve the above problem, Tian et al.…”

Tunable photoluminescence and SERS behaviour of additively manufactured Au nanoparticle patterns

“…Metal nanoparticles (MNPs) and metal nanostructures (MNSs) are used for detection purposes in optical biosensors due to their unique optical behaviours. [1][2][3][4][5] Biosensors based on MNPs and MNSs allow simple, rapid, straightforward, and label-free detection of analytes and biomarkers in very low concentrations with high selectivity and sensitivity [6][7][8][9] due to the electromagnetic eld enhancement of the structures. 8,10 The electromagnetic enhancement comes from the coherent oscillation of electron clouds, excited by incident light at the metal/ dielectric interface.…”