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

Pál, Petra; Bonyár, Attila; Vereš, M.; Juhász, Laura; Szalóki, Melinda; Csarnovics, István

doi:10.3390/app11219838

Cited by 12 publications

(2 citation statements)

References 42 publications

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“…However, most of the reported formulas for the EEF [29,[33][34][35] are for the conventional geometries where the number of analyte molecules needs to be estimated both in the normal Raman and SERS assuming a uniform distribution of plasmonic particles in the SERS substrate. The usual formula used is given by [36,37] ( )…”

Section: Estimation Of Eefmentioning

confidence: 99%

Surface enhanced Raman scattering in thin films: the importance of Raman analyte-plasmonic particle inverse geometry

Naik,

Biswal,

Laha

et al. 2024

Phys. Scr.

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Most of the successful applications of surface enhanced Raman scattering (SERS) involves placing the Raman analyte molecule over the SERS substrate. This conventional geometry of SERS does not work when the Raman analyte is in the form of a thin film. In this report, we experimentally demonstrate the importance of the rarely explored inverse geometry wherein a plasmonic particle is placed over an analyte thin film for SERS study. Initially, as a case study, the effect of size, concentration, and distribution of gold nanoparticles (AuNPs) on the SERS of Si wafer was performed. The AuNPs, prepared by optimized annealing of direct current sputtered Au, were characterized by scanning electron microscopy, atomic force microscopy, and UV-Visible spectrophotometry. Finally, as an application, SERS in inverse geometry was successfully performed with an electron-beam evaporated Si thin film. For the first time, a working formula has been proposed to determine the experimental enhancement factor (EEF) for the inverse geometry of SERS. The values of EEF were estimated to be 1526 and 3274 respectively for Si wafer and Si thin film for the similar distribution of AuNPs of average size 52 nm. This study provides an insight into the characterization of thin films.

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Section: Estimation Of Eefmentioning

confidence: 99%

Surface enhanced Raman scattering in thin films: the importance of Raman analyte-plasmonic particle inverse geometry

Naik,

Biswal,

Laha

et al. 2024

Phys. Scr.

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“…The surface-enhanced Raman scattering (SERS) phenomenon was first reported when Fleischmann discovered that pyridine molecules displayed abnormally high Raman signals when adsorbed on rough Ag electrodes. 1 In the past few decades, SERS has been widely employed in fields such as biomolecular analysis, 2 environmental testing, 3 and medicine 4 fields due to its nondestructive and molecular fingerprinting testing characteristics. 5 At present, the SERS enhancement mechanism is classified into two types: electromagnetic enhancement (EM) and chemical enhancement (CM).…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution of Ag/Ta Nanostructured Films for Surface-Enhanced Raman Scattering Substrates

Zhang

Shi

et al. 2023

ACS Appl. Nano Mater.

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Surface-enhanced Raman scattering (SERS), a nondestructive, ultrasensitive detection method, has a wide range of potential applications. However, its application is limited due to the weak Raman scattering signals. Therefore, it is urgent to explore a simple physical method to prepare SERS substrates with high detection limits and excellent reproducibility. In this work, Ta−Ag alloy films were prepared by magnetron sputtering at room temperature, and a large number of Ag nanoparticles were selfformed on the alloy films' surface by adjusting the deposition time, Ag content, and annealing temperature. Further research reveals that this is because the amorphous Ta in the alloy films prevents the growth of Ag grains inside Ta−Ag alloy films, resulting in the diffusion of Ag atoms to the alloy film's surface to form Ag nanoparticles. The results demonstrate that Ag nanoparticles/Ta 55.5 at % Ag alloy films used as SERS substrates have excellent reproducibility and high sensitivity to detect 5 × 10 −16 mol L −1 rhodamine 6G (R6G) solution and 5 × 10 −12 mol L −1 crystal violet (CV) solution. This method provides a simple approach to developing highperformance SERS substrates.

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Highly flexible copper tape decorated with Ag nanoarrays as ultrasensitive SERS platforms for multi-hazardous pollutant sensing

Shameer,

Anand,

Columbus

et al. 2024

Microchim Acta

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

Cited by 12 publications

References 42 publications

Surface enhanced Raman scattering in thin films: the importance of Raman analyte-plasmonic particle inverse geometry

Surface enhanced Raman scattering in thin films: the importance of Raman analyte-plasmonic particle inverse geometry

Microstructure Evolution of Ag/Ta Nanostructured Films for Surface-Enhanced Raman Scattering Substrates

Highly flexible copper tape decorated with Ag nanoarrays as ultrasensitive SERS platforms for multi-hazardous pollutant sensing

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