A generalized exponential relationship between the surface-enhanced Raman scattering (SERS) efficiency of gold/silver nanoisland arrangements and their non-dimensional interparticle distance/particle diameter ratio

Pál, Petra; Bonyár, Attila; Vereš, M.; Himics, L.; Balázs, Läszlö; Juhász, Laura; Csarnovics, István

doi:10.1016/j.sna.2020.112225

Cited by 40 publications

(31 citation statements)

References 39 publications

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“…In the case of gold nanoisland substrates, a higher enhancement would be expected for 532 nm excitation, since the magnitude of the SERS enhancement is influenced by the plasmon wavelength of the substrate. We know that the LSPR peak of the active surface must fall close to the wavelength of the excitation source [12]. This is true in the case of rhodamine 6G, where a higher enhancement was observed with the green laser, but the opposite occurs for riboflavin.…”

Section: Resultsmentioning

confidence: 95%

“…The high temperature causes diffusion on the surface, which results in cracking of the layer, followed by nanoscale island formation. The heat treatment was performed at different temperatures (450, 500, and 550 • C) and for different periods (15,30,60, and 120 min), which led to the formation of gold nanoparticles having different parameters (e.g., particle diameter, interparticle distance and so, plasmon wavelength) [12]. The following table (Table 1) summarizes the production parameters of the 18 substrates that were examined in our study.…”

Section: Preparation Of Gold Nanoislands As Sers Substratesmentioning

confidence: 99%

“…In our previous work, examining the effect of size and distance of Au and Ag nanoparticles generated by heat treatment of a thin metallic layer produced by vacuum evaporation, we found that the SERS effect increases linearly with particle size, as larger particles function as larger scattering centers [12]. In addition, by reducing the distance between the particles, hot spots will be located closer to each other, leading to the formation of highly concentrated EM fields, which results in the enhancement of Raman signals [12,[16][17][18].…”

Section: Introductionmentioning

confidence: 95%

“…Manufacturing technologies allow tuning of the size and shape of the nanoparticles, which can also greatly influence the degree of enhancement [10,11]. To produce substrates with optimal parameters providing maximum SERS enhancement [12], it is necessary to understand how the material, size, shape, and arrangement of nanoparticles, or the excitation source, affect SERS efficiency [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the plasmon peak shows a redshift with increasing size of the nanostructures and distance between the particles. If the wavelength of the excitation source is far from the LSPR peak of the plasmonic material, the extent of EF also decreases [12,13].…”

Section: Introductionmentioning

confidence: 99%

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An Investigation of Surface-Enhanced Raman Scattering of Different Analytes Adsorbed on Gold Nanoislands

et al. 2021

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In this study, metallic nanoislands were prepared by thermal annealing of gold thin film produced by vacuum evaporation on a glass substrate to investigate the surface-enhanced Raman scattering (SERS) effect on them. The influence of the analyte on the enhancement factor of SERS was studied with riboflavin and rhodamine 6G dye. Two laser excitation sources at 532 and 633 nm wavelengths were used for SERS measurements. We found that the enhancement factors of the gold nanoisland SERS substrates were influenced by the analytes’ adsorption tendency onto their surfaces. The SERS amplification was also found to be dependent on the electronic structure of the molecules; higher enhancement factors were obtained for rhodamine 6G with 532 nm excitation, while for riboflavin the 633 nm source performed better.

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Section: Resultsmentioning

confidence: 95%

Section: Preparation Of Gold Nanoislands As Sers Substratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Investigation of Surface-Enhanced Raman Scattering of Different Analytes Adsorbed on Gold Nanoislands

et al. 2021

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Advancing Mycotoxin Detection in Food and Feed: Novel Insights from Surface‐Enhanced Raman Spectroscopy (SERS)

Logan,

Cao,

Freitag

et al. 2024

Advanced Materials

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The implementation of low‐cost and rapid technologies for the on‐site detection of mycotoxin‐contaminated crops is a promising solution to address the growing concerns of the agri‐food industry. Recently, there have been significant developments in Surface‐enhanced Raman spectroscopy (SERS) for the direct detection of mycotoxins in food and feed. This review provides an overview of the most recent advancements in the utilization of SERS through the successful fabrication of novel nanostructured materials. Various bottom‐up and top‐down approaches have demonstrated their potential in improving sensitivity, while many applications exploit the immobilization of recognition elements and molecular imprinted polymers (MIPs) to enhance specificity and reproducibility in complex matrices. Therefore, the design and fabrication of nanomaterials is of utmost importance and are presented herein. We uncover that limited studies establish limits of detection (LODs) or conduct validation using naturally contaminated samples. One decade on, SERS is still lacking significant progress and there is a disconnect between the technology, the European regulatory limits, and the intended end‐user. Ongoing challenges and potential solutions are discussed including nanofabrication, molecular binders, and data analytics. Recommendations to assay design, portability, and substrate stability are made to help improve the potential and feasibility of SERS for future on‐site agri‐food applications.This article is protected by copyright. All rights reserved

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Holographic Manipulation of Nanostructured Fiber Optics Enables Spatially‐Resolved, Reconfigurable Optical Control of Plasmonic Local Field Enhancement and SERS

Collard

Pisano

Zheng

et al. 2022

Small

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Integration of plasmonic structures on step‐index optical fibers is attracting interest for both applications and fundamental studies. However, the possibility to dynamically control the coupling between the guided light fields and the plasmonic resonances is hindered by the turbidity of light propagation in multimode fibers (MMFs). This pivotal point strongly limits the range of studies that can benefit from nanostructured fiber optics. Fortunately, harnessing the interaction between plasmonic modes on the fiber tip and the full set of guided modes can bring this technology to a next generation progress. Here, the intrinsic wealth of information of guided modes is exploited to spatiotemporally control the plasmonic resonances of the coupled system. This concept is shown by employing dynamic phase modulation to structure both the response of plasmonic MMFs on the plasmonic facet and their response in the corresponding Fourier plane, achieving spatial selective field enhancement and direct control of the probe's work point in the dispersion diagram. Such a conceptual leap would transform the biomedical applications of holographic endoscopic imaging by integrating new sensing and manipulation capabilities.

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A generalized exponential relationship between the surface-enhanced Raman scattering (SERS) efficiency of gold/silver nanoisland arrangements and their non-dimensional interparticle distance/particle diameter ratio

Cited by 40 publications

References 39 publications

An Investigation of Surface-Enhanced Raman Scattering of Different Analytes Adsorbed on Gold Nanoislands

An Investigation of Surface-Enhanced Raman Scattering of Different Analytes Adsorbed on Gold Nanoislands

Advancing Mycotoxin Detection in Food and Feed: Novel Insights from Surface‐Enhanced Raman Spectroscopy (SERS)

Holographic Manipulation of Nanostructured Fiber Optics Enables Spatially‐Resolved, Reconfigurable Optical Control of Plasmonic Local Field Enhancement and SERS

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