One-step fabrication of fiber optic SERS sensors via spark ablation

Kohut, Attila; Horváth, Viktória; Pápa, Zsuzsanna; Vajda, Balázs; Kopniczky, Judit; Galbács, Gábor; Geretovszky, Zsolt

doi:10.1088/1361-6528/ac0c41

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…As for the gap dimensions, we adhered to a 2 nm size. Additionally, we examined particle radius within the range of 10–70 nm, known for their high SERS enhancement at the visible wavelength. , Silver also has been extensively utilized in probes because of its excellent field enhancement capabilities. − However, silver tends to oxidize easily, limiting its effectiveness for long-term SERS detection . Consequently, our research focuses on Au for SERS probes.…”

Section: Results and Discussionmentioning

confidence: 99%

A Comprehensive Numerical Study on Fiber Optic SERS Probe Design

Kim,

Gomes,

De Koninck

et al. 2024

J. Phys. Chem. C

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A fiber optic surface-enhanced Raman spectroscopy (SERS) probe has emerged as a promising solution for remote and label-free chemical sensing. However, unlocking its full potential still requires enhancing the SERS enhancement factors, which depends on two key aspects: improving the local field enhancement and efficient collection of Raman dipole moment through the fiber. Meeting this challenge requires a thorough understanding of parameters influencing the sensitivity of fiber optic SERS probes and the finding of the most effective configuration for maximizing SERS sensitivity. In our extensive numerical study, we delve into the intricate interplay among plasmonic nanostructures, excitation wavelength, fiber material properties, and SERS enhancement within a water environment. By unraveling the synergistic effects of these elements, our research pinpoints the customized parameter set that achieves maximum performance across diverse variables tailored specifically for remote chemical sensing applications.

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Section: Results and Discussionmentioning

confidence: 99%

A Comprehensive Numerical Study on Fiber Optic SERS Probe Design

Kim,

Gomes,

De Koninck

et al. 2024

J. Phys. Chem. C

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“…Since spark ablation can conveniently be used to produce multielement NPs by simply combining dissimilar alloyed or 2 of 16 compacted electrodes [34,35], this tunability even includes the crystal structure of the produced particles [29,36,37]. NPs generated via spark ablation have been successfully used in various applications, such as gas- [4,[38][39][40][41][42][43] and light [44] sensors, catalytic surfaces [45,46], or SERS substrates [10,12,[47][48][49][50]. These applications used different approaches to deposit the NPs to a surface, starting from the most straightforward filtering [10] to a highly sophisticated, electrical field-assisted 3D microprinting method [49].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Nanoparticle Agglomerate Films by Spark Ablation and Their Application in Surface-Enhanced Raman Spectroscopy

et al. 2023

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This paper presents a systematic study of the investigation of nanoparticle (NP) agglomerate films fabricated via depositing spark-generated Au, Ag, and Au/Ag NPs onto quartz microscope coverslips in a low-pressure inertial impactor. The primary focus of the study is to characterize these nanostructures and to examine their potential application in surface-enhanced Raman spectroscopy (SERS). The characterization of the produced nanostructures was carried out by performing optical absorbance measurements, morphology, and composition analysis, as well as testing the SERS performance of the NP films at three different excitation laser wavelengths in the visible range. The study aims to investigate the relationship between the optical properties, the morphology, and the enhancement of the produced samples at different excitations, and the results are presented and discussed. The study highlights the potential of using spark ablation and inertial impaction-based deposition as a method for producing nanoparticle films for SERS.

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“…In combination with direct deposition from the aerosol phase by impaction allows 3D printing of nanoparticle films onto most substrates. This production method has been successfully applied in catalysis [15,16], gas sensors [17,18], and surface enhanced Raman spectroscopy (SERS) [19,20].…”

Section: Introductionmentioning

confidence: 99%

Mass and density determination of porous nanoparticle films using a quartz crystal microbalance

et al. 2022

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A method is presented to directly measure the mass output of an impaction printer coupled with a spark ablation generator. It is based on a quartz crystal microbalance and shown to be reliable in quantifying mass deposition rate. Here, the method is demonstrated with an Au nanoparticle aerosol synthesized under several spark ablation and deposition settings. Changes in the deposition rate in response to changed synthesis conditions follow the spark ablation models on generation rate made in previous studies, validating this novel measurement method. In combination with the volume of a deposit, a good estimate of the film porosity can be made. The Au nanoparticle films synthesized here have a low porosity of 0.18 due to extensive restructuring and compaction on impact with the substrate. The porosity is found to be insensitive to deposition settings and is constant throughout the film. The simplicity and low cost of a quartz crystal microbalance setup make this an accessible method to determine porosity in porous thin films.

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One-step fabrication of fiber optic SERS sensors via spark ablation

Cited by 8 publications

References 34 publications

A Comprehensive Numerical Study on Fiber Optic SERS Probe Design

A Comprehensive Numerical Study on Fiber Optic SERS Probe Design

Fabrication of Nanoparticle Agglomerate Films by Spark Ablation and Their Application in Surface-Enhanced Raman Spectroscopy

Mass and density determination of porous nanoparticle films using a quartz crystal microbalance

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