Optimization of a hybrid plasmonic configuration: particle on a corrugated film and its SERS application

Abstract

A plasmonic hybrid structure of particles on a Au film over nanoparticles (particle-AuFON) configuration was studied for application in SERS. It showed great potential in SERS-based sensing and it provides outstanding uniformity, repeatability and stability.

Surface-Enhanced Raman Spectroscopy Substrates for Food Safety and Quality Analysis

“…52 In MNPs-based substrates, the nanogaps can generate hot spots using aggregation, of which the nanoparticles have the benefits of high enhancement factor, tunable shape, and superior biocompatibility. 53 The optical properties of nanoparticles (e.g., absorption, transmission, reflection, and light emission) are dynamic and can be changed as a function of particle size 24 Copyright 2020 Elsevier. 29 (b) Gecko-inspired nanotentacle substrate has been developed by depositing AgNPs on a 3D PDMS nanotentacle array for the detection of pesticide residues in fresh produce.…”

“…These mixed NPs can generate significant signal enhancement originating from hot spot improvement and densification, as long as they deliver uniformity, reproducibility, and stability, three critical factors in the SERS-based analysis. 53 To validate the feasibility of the mixed plasmonic metal nanostructures in SERS-based detection, Zhou et al 20 employed Au-core/Ag-shell nanoparticles as a SERS substrate for real-time quantification of melamine in milk with a detection limit of ∼5 μM. Adding melamine increases the milk's nitrogen concentration and hence its apparent protein content.…”

“…71 In addition, the size, shape, and aggregation of NPs cannot be precisely controlled, leading to a change in intensity and stability of SERS hot spots in real-world scenarios. 53 Semiconductors. Inorganic Semiconductors.…”

“…In addition, electromagnet interaction between the original hot spots and new hot spots can potentially boost the intensity of the hot spots. 53 In an attempt to fabricate a hybrid SERS substrate, Xu et al 71 employed a metal-doped anchoring zeolitic imidazolate framework-67 (ZIF-67) coated on textile materials and used it for the detection of foodborne pathogens. The developed substrate exhibited outstanding SERS performance for the detection of Escherichia coli and Staphylococcus aureus with a low limit of detection of 10 −8 M. It has been shown that the substrate is flexible and reusable, suitable for sensitive detection of microorganisms at low cost.…”

“…Plasmonic metal nanoparticles (MNPs) such as gold (Au), silver (Ag), platinum (Pt), copper (Cu), and aluminium (Al) have received great interest in the fields of biology, chemistry, energy, and information. , These types of MNPs have also been employed for the manufacture of SERS substrates because of their unique properties including stability, easy manufacturing process, and good functioning with SERS (Figure ). In MNPs-based substrates, the nanogaps can generate hot spots using aggregation, of which the nanoparticles have the benefits of high enhancement factor, tunable shape, and superior biocompatibility . The optical properties of nanoparticles (e.g., absorption, transmission, reflection, and light emission) are dynamic and can be changed as a function of particle size and surface morphology.…”