Surface-enhanced Raman scattering (SERS) spectroscopy on localized silver nanoparticle-decorated porous silicon substrate

Tsao, Chia-Wen; Zheng, You-Shan; Sun, Ya-Sen; Cheng, Yu‐Che

doi:10.1039/d1an01708j

Cited by 17 publications

(4 citation statements)

References 39 publications

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“…Compared with the two-dimensional counterpart, three-dimensional SERS substrates can provide larger surface area, more hotspots in the excitation light beam, and thus higher sensitivity ( Li et al, 2018 ; Pal et al, 2019 ; Tsao et al, 2021 ). Therefore, three-dimensional nanoporous Al-Ag zig-zag silver nanorod arrays and buckled PDMS silver nanorod arrays fabricated by glancing angle deposition (GLAD), and three-dimensional hybrid MoS 2 /AgNPs/inverted pyramid PMMA resonant cavity system have shown excellent SERS performance ( Kumar et al, 2015 ; Rajput et al, 2017 ; Li et al, 2018 ).…”

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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“…[21][22][23] Concerning the use of metals, nanostructured silver (Ag) is of particular interest due to its versatile usage. The optoelectronic properties of Ag on the nanoscale can be exploited in catalysts, 24,25 flexible electrodes, 26 sensors, [27][28][29][30][31][32][33] photonic crystals 34,35 and antibacterial agents. 36,37 Furthermore, it was previously shown that a thin polymer film can be stabilized by the presence of noble metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Diblock copolymer pattern protection by silver cluster reinforcement

Bulut,

Sochor,

Harder

et al. 2023

Nanoscale

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“…There are several papers that have shown the improvement in SERS enhancement, introducing several techniques such as the combination of metal-organic frameworks (MOFs) with plasmonic metal nanoparticles [34], silver nanoparticles with porous silicon substrate [35], metal-modified montmorillonite [36], AuNRs functionalized zirconiumbased MOFs [37], and etched-spiky Au@Ag plasmonic superstructures [38]. Our system can analyze bacteria samples without labels using a reusable biosensing device made of graphene and AuNRs.…”

Section: Introductionmentioning

confidence: 99%

Gold Nanorod Density-Dependent Label-Free Bacteria Sensing on a Flake-like 3D Graphene-Based Device by SERS

Hossain,

Nanda,

Cho

et al. 2023

Biosensors

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Surface-enhanced Raman spectroscopy (SERS) is an effective technique for biosensing, enabling label-free detection of biomolecules with enhanced sensitivity. There is a tremendous probability of signal failure in Raman frequencies because of the scattering of the Raman radiation in liquids, effective SERS improvement is required to reduce this issue when considering liquid specimens. We examined a liquid bacterial sample, investigating the electrostatic interactions of the bacterial samples with gold nanorods (AuNRs) and graphene. We established a voltage-gated 3D graphene functionalized with an AuNR-based device on the silicon substrate for SERS measurements when the applied voltage ranges from 0 to 3 V. Moreover, AuNRs density-susceptible bacterial sample analysis with varied concentrations of bacterial samples has also been described. Using bacterial SERS analysis, the bacterial components amide II (1555–1565 cm−1) and amide III (1250–1350 cm−1) have been discovered for both bacteria, Gram-positive, Listeria monocytogenes and Gram-negative, Salmonella typhi. Our fabricated device affords an interesting label-free, rapid, and reproducible bacterial sample analysis based on the density of the AuNRs when functionalizing flake-like 3D graphene, which can help facilitate label-free bacteria sensing platforms.

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Surface-enhanced Raman scattering (SERS) spectroscopy on localized silver nanoparticle-decorated porous silicon substrate

Abstract: We use a simple, low-cost electroless etching and deposition process to create a localized silver nanoparticle decorated surface porous silicon (LocAg-PS). The LocAg-PS surface exhibits self-align and sample condensation capabilities for SERS analysis.

Cited by 17 publications

References 39 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

Diblock copolymer pattern protection by silver cluster reinforcement

Gold Nanorod Density-Dependent Label-Free Bacteria Sensing on a Flake-like 3D Graphene-Based Device by SERS

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