Rapid and sensitive SERS detection of melamine in milk using Ag nanocube array substrate coupled with multivariate analysis

Li, Limin; Chin, Wee Shong

doi:10.1016/j.foodchem.2021.129717

Cited by 34 publications

(6 citation statements)

References 33 publications

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“…In comparison to traditional technologies such as infrared (IR) spectroscopy and gas chromatography (GC) ( Song et al, 2016 ; Li and Chin, 2021 ), surface-enhanced Raman scattering (SERS) spectroscopy has lower cost and comparable or even more superior sensitivity. Therefore, SERS technology has bright prospects in many fields, such as trace detection, environmental monitoring, food safety, biochemical sensing and so on ( Zhu et al, 2021a ; Li et al, 2021 ; Yan et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Arrays of Ag-nanoparticles decorated TiO2 nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection

et al. 2022

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Three-dimensional surface-enhanced Raman scattering (SERS) substrates usually provide more hot spots in the excitation light beam and higher sensitivity when compared with the two-dimensional counterpart. Here a simple approach is presented for the fabrication of arrays of Ag-nanoparticles decorated TiO2 nanotubes. Arrays of ZnO nanorods were fabricated in advance by a hydrothermal method. Then TiO2 nanotube arrays were achieved by immersing the arrays of ZnO nanorods in an aqueous solution of (NH4)2TiF6 for 1.5 h. Vertically aligned TiO2 nanotube arrays were modified with dense Ag nanoparticles by Ag mirror reaction. High density of Ag nanoparticles decorated on the fabricated TiO2 nanotubes provide plenty of hotspots for Raman enhancement. In addition, the fabricated array of Ag nanoparticles modified TiO2 nanotubes can serve as a reusable SERS substrate because of the photocatalytic activity of the TiO2 nanotubes. The SERS substrate adsorbed with analyte molecules can realize self-cleaning in deionized water after UV irradiation for 2.5 h. The sensitivity of the fabricated SERS substrate was investigated by the detection of organic dye molecules. The detectable concentration limits of rhodamine 6G (R6G), malachite green (MG) and methylene blue (MB) were found to be 10−12 M, 10−9 M and 10−8 M, respectively. The enhancement factor (EF) of the three-dimensional SERS substrate was estimated to be as high as ∼1.4×108. Therefore, the prepared Ag nanoparticles modified TiO2 nanotube arrays have promising potentials to be applied to rapid and trace SERS detection of organic chemicals.

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Section: Introductionmentioning

confidence: 99%

Arrays of Ag-nanoparticles decorated TiO2 nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection

et al. 2022

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“…These two dangerous chemicals were, nonetheless, detected in milk up to a quantity of 2 ppm according to this investigation. In a different investigation, melamine in milk up to 0.5 ppm was detected using SERS in combination with an Ag nanocube array substrate ( Li and Chin, 2021 ). Both of these results, however, are completely unreliable if the relevant dangerous compounds are present in amounts lower than 0.5 ppm.…”

Section: Resultsmentioning

confidence: 99%

Trace level detection of melamine and cyanuric acid extracted from pet liquid food (milk) using a SERS Au nanogap substrate

Joshi,

Adhikari,

Kim

et al. 2024

Current Research in Food Science

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“…wafer) were achieved, as shown in Figure 5 ; and Figure S17 of the Supporting Information. These chips were further applied to the detection of both heavy metal trace Hg ions in water and melamine (MEL) in alcohol with a LOD of 5.3 ×10 −12 m (1.06 ppt, R 2 = 0.990) for Hg and a LOD of 1.02 × 10 −8 m ( R 2 = 0.994) for MEL using a 632.8 nm laser Raman spectrometer, which are also very outstanding among the literature, [ 36 , 37 , 38 ] as shown in Figure 5 . Therefore, the SERS chips designed by carefully considering the key role of dielectric vertical walls, and vertical as well as horizontal layers, and batch‐fabricated using the cost‐effective NIL processes show excellent detection performances for targets with different natures, which are of great promise in practical applications such as public security, environmental monitoring, health monitoring and disease diagnosis, and medicine, cosmetic, and food safety, as shown in Figure 6 .…”

Section: Resultsmentioning

confidence: 99%

Dielectric Walls/Layers Modulated 3D Periodically Structured SERS Chips: Design, Batch Fabrication, and Applications

Tian

Chen

et al. 2022

Advanced Science

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As an indispensable constituent of plasmonic materials/dielectrics for surface enhanced Raman scattering (SERS) effects, dielectrics play a key role in excitation and transmission of surface plasmons which however remain more elusive relative to plasmonic materials. Herein, different roles of vertical dielectric walls, and horizontal and vertical dielectric layers in SERS via 3D periodic plasmonic materials/dielectrics structures are studied. Surface plasmon polariton (SPP) interferences can be maximized within dielectric walls besieged by plasmonic layers at the wall thicknesses of integral multiple half-SPP plasmonic material-dielectric -wavelength which effectively excites localized surface plasmon resonance to improve SERS effects by one order of magnitude compared to roughness and/or nanogaps only. The introduction of extra Au nanoparticles on thin dielectric layers can further enhance SERS effects only slightly. Thus, the designed Au/SiO 2 based SERS chips show an enhancement factor of 8.9 × 10 10 , 265 times higher relative to the chips with far thinner SiO 2 walls. As many as 1200 chips are batch fabricated for a 4 in wafer using cost-effective nanoimprint lithography which can detect trace Hg ions as low as 1 ppt. This study demonstrates a complete generalized platform from design to low-cost batch-fabrication to applications for novel high performance SERS chips of any plasmonic materials/dielectrics.

show abstract

Rapid and sensitive SERS detection of melamine in milk using Ag nanocube array substrate coupled with multivariate analysis

Cited by 34 publications

References 33 publications

Arrays of Ag-nanoparticles decorated TiO2 nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection

Arrays of Ag-nanoparticles decorated TiO2 nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection

Trace level detection of melamine and cyanuric acid extracted from pet liquid food (milk) using a SERS Au nanogap substrate

Dielectric Walls/Layers Modulated 3D Periodically Structured SERS Chips: Design, Batch Fabrication, and Applications

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