Hybrid 3D SERS substrate for Raman spectroscopy

Li, Rui; Lei, Jia; Zhou, Yi; Li, Hong

doi:10.1016/j.cplett.2020.137733

Cited by 4 publications

(5 citation statements)

References 38 publications

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“…The same operating principle used in Tip-Enhancement Raman Spectroscopy (TERS) systems is applied to devices that rely on conductive pyramidal structures. However, a periodic system needs to be defined for this type of component, which is not conventionally considered in various experimental demonstrations found in the literature. − However, it is also important to highlight that some works have taken advantage of the geometric characteristics and periodicity of the pyramids to improve Raman signal enhancement for biodetection processes. , …”

Section: Resultsmentioning

confidence: 99%

Tunable Surface Plasmon-Polaritons Interaction in All-Metal Pyramidal Metasurfaces: Unveiling Principles and Significance for Biosensing Applications

Marques,

Isayama,

Teixeira

et al. 2024

ACS Appl. Opt. Mater.

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In this work, we demonstrated a tunable double anticrossing interaction resulting from the interplay between two LSPR modes and an SPP wave in an all-metal pyramidal metasurface. The tuning is done as a function of the variation of the angle of incidence of the input electric field. From the double anticrossing, it was demonstrated that at certain angles of incidence, the intensity field obtained at specific wavelengths is strongly favored due to the nature of the pyramidal structures used, which consequently would benefit applications such as SERS, as shown in this manuscript. The implemented geometry enables the observation of an LSPR mode, which controls and synchronizes other resonances while also providing high sensitivity to surface changes, demonstrating sensitivities 10 3 times higher than those achieved in conventional systems based on LSPR when detecting the P. brasiliensis antigen.

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Section: Resultsmentioning

confidence: 99%

Tunable Surface Plasmon-Polaritons Interaction in All-Metal Pyramidal Metasurfaces: Unveiling Principles and Significance for Biosensing Applications

Marques,

Isayama,

Teixeira

et al. 2024

ACS Appl. Opt. Mater.

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“…Previous studies showed that the SPR effect of Au occurs at 515.1 nm and that of Ag is at 395.8 nm, so the SPR effect of Au is stronger than that of Ag [ 50 ]. Combined with the simulation, it can be inferred that the enhancement principles of PPS and IPS are different; the enhancement mechanism of IPS is dominated by scattering [ 51 ], while that of PPS is dominated by SPR [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…The error of the characteristic peaks reflects the homogeneity of the SERS performance of the substrate structure. and IPS are different; the enhancement mechanism of IPS is dominated by scattering [51], while that of PPS is dominated by SPR [44].…”

Section: Raman Spectra Of R6g On Pyramidal Sensorsmentioning

confidence: 92%

“…To strip the metallic nanofilm structure onto a flexible substrate, UVcp was used, to obtain a high-fidelity and high-sensitivity sensor. A regular surface textured crystalline silicon solar cell substrate was chosen as the master mold, which placed random pyramids on the surface [ 44 ], as shown in Figure 1 a; the substrate is about the size of a coin. A noble metal film with a thickness of 200 nm was deposited on the surface of the substrate, as shown in Figure 1 b,c, then the UVcp was dropped onto the surface of the noble metal film.…”

Section: Methodsmentioning

confidence: 99%

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Noble Metallic Pyramidal Substrate for Surface-Enhanced Raman Scattering Detection of Plasmid DNA Based on Template Stripping Method

Chen

et al. 2021

Micromachines

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In this paper, a new method for manufacturing flexible and repeatable sensors made of silicon solar cells is reported. The method involves depositing the noble metal film directly onto the Si template and stripping out the substrate with a pyramid morphology by using an adhesive polymer. In order to evaluate the enhancement ability of the substrate, Rhodamine 6G (R6G) were used as surface-enhanced Raman scattering (SERS) probe molecules, and the results showed a high sensitivity and stability. The limit of detection was down to 10−12 M for R6G. The finite-difference time domain (FDTD) was used to reflect the distribution of the electromagnetic field, and the electric field was greatly enhanced on the surface of the inverted pyramidal substrate, especially in pits. The mechanism of Raman enhancement of two types of pyramidal SERS substrate, before and after stripping of the noble metal film, is discussed. By detecting low concentrations of plasmid DNA, the identification of seven characteristic peaks was successfully realized using a noble metallic pyramidal substrate.

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“…Normally, SERS is used for detecting analytes at very low concentrations. There are 3 types of SERS: colloid-based [1,2], thin film-based [3,4] and 3D-hybrid structure-based SERS [5][6][7][8][9]. Colloid-based and thin film-based SERS can enhance the Raman signal, but they are non-uniform and non-repeatable devices.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Raman Signal Enhancement by Ag and Au/Ag Nanoparticles Decorated on Aluminum Sheet SERS

Limwichean

Pangpaiboon

Phetnam

et al. 2021

Curr. Appl. Sci. Technol.

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Surface Enhance Raman Spectroscopy (SERS) is a well-known technique used to analyze solutions of various substances that are at very low concentration levels. To create plasmonic resonance, many researchers have used Au nanoparticles decorated on SERS. Although Au nanoparticles offer high efficiency and high stability, they are expensive. An inexpensive noble metal with high numbers of free electrons, Ag nanoparticles has become an interesting alternative. However, Ag has a major drawback because it is easily oxidized. Therefore, this research aims to combine the good properties between Au and Ag nanoparticles for Raman signal enhancement. A low-cost laser marking technique was used to engrave aluminum surface. The Au/Ag nanoparticles were co-sputtered on the aluminum template with decorating times ranging from 30-360 s. FE-SEM was used to characterize the nanostructure of the nanoparticles on SERS. Hydrophobic properties of the SERS surface were identified by contact angle measurement. A Raman spectrometer was used to measure the intensity of the enhanced Raman signal. From the results, the decorating time that provided the highest contact angle and highest Raman intensity enhancement was 270 s for both Ag and Au/Ag nanoparticles. The limit of detection of Ag and Au/Ag aluminum SERS was 10-8 M for Rhodamine-6 G. The enhancement factor for Ag aluminum SERS was slightly greater than that for Au/Ag aluminum SERS, as expected. After 60 days of shelf-life testing, Ag aluminum SERS presented the highest Raman enhancement. However, the Raman signal from Ag aluminum SERS dramatically decreased, afterwards. On the other hand, Au/Ag aluminum SERS showed a constant ability to enhance the Raman signal for as long as 150 days.

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Hybrid 3D SERS substrate for Raman spectroscopy

Cited by 4 publications

References 38 publications

Tunable Surface Plasmon-Polaritons Interaction in All-Metal Pyramidal Metasurfaces: Unveiling Principles and Significance for Biosensing Applications

Tunable Surface Plasmon-Polaritons Interaction in All-Metal Pyramidal Metasurfaces: Unveiling Principles and Significance for Biosensing Applications

Noble Metallic Pyramidal Substrate for Surface-Enhanced Raman Scattering Detection of Plasmid DNA Based on Template Stripping Method

Efficiency of Raman Signal Enhancement by Ag and Au/Ag Nanoparticles Decorated on Aluminum Sheet SERS

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