Surface Plasmon Polaritons on Silver Gratings for Optimal SERS Response

Kalachyova, Y.; Martin, David; Lyutakov, Oleksiy; Koštejn, Martin; Lapčák, Ladislav; Švorčı́k, Václav

doi:10.1021/acs.jpcc.5b01793

Cited by 67 publications

(58 citation statements)

References 39 publications

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“…As can be expected, each applied wavelength has its ''optimum'' wavelength and metal thickness. 7 In particular, when the 630 nm wavelength excitation was applied, a more pronounced response was measured for the 20 nm thick metal layer with 240 nm periodicity of the grating. When the 785 nm excitation wavelength was used, the optimal Ag thickness was found to be 38 nm, and the periodicity of 280 nm gives better results.…”

Section: Resultsmentioning

confidence: 98%

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Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

Kalachyova

Martin

Jeřábek

et al. 2017

Phys. Chem. Chem. Phys.

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Surface-enhanced Raman scattering (SERS) spectroscopy is an extremely sensitive analytical technique that is capable of identifying the vibration signatures of target molecules up to single-molecule sensitivity. In this work, the ultrahigh sensitivity of SERS has been achieved through the immobilization of sharp-edges specific nanoparticles -so-called gold multibranched NPs (AuMs) on the silver grating surface through the biphenyl dithiol. This approach allows combining the extremely high SERS enhancement factor (better than that in the case of AuMs immobilized on the flat Ag film) with perfect reproducibility of Raman signals. The grating was created on the polymer substrate using the excimer laser modification and further metal deposition and has an ''active'' area 5 Â 10 mm 2 , enabling the macroscale SERS substrate preparation. The wet-chemistry synthesized AuMs were then immobilized on the grating surface and the produced structure allows SERS measurements with a portable Raman spectrophotometer. The prepared structures were checked using the AFM, UV-Vis, and Raman spectroscopy techniques.

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Section: Resultsmentioning

confidence: 98%

“…The parameters of Ag sputtering were optimized in our previous studies. 7,33 In the next step, the BFDT (biphenyl-4,4 0 -dithiol) molecules were grafted on the grating surface using the common thiol-based chemistry procedure.…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

Kalachyova

Martin

Jeřábek

et al. 2017

Phys. Chem. Chem. Phys.

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“…Preparation of plasmon‐active gold gratings was performed according to a previously reported procedure . A schematic of the surface functionalization of the grating with PNIPAm is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…Plasmonically active metal nanostructures have become a key element in a variety of scientific and technical fields . Their unique interaction with light enables the preparation of optically triggerable catalytic systems, extremely sensitive sensor platforms, and photonic modulators with unprecedented speed .…”

Section: Introductionmentioning

confidence: 99%

Large‐Scale, Ultrasensitive, Highly Reproducible and Reusable Smart SERS Platform Based on PNIPAm‐Grafted Gold Grating

et al. 2017

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A smart plasmonic sensor based on periodic gold gratings grafted with poly(N‐isopropyl acrylamide) (PNIPAm) has been designed and realized. A periodic gold structure was created on the polymer backing with an excimer laser (1×2 cm2 modified area) and was subsequently covered by thin gold film. In the next step, a 7 nm thick PNIPAm layer was grafted to the gold surface through a two‐step procedure: covalent attachment of 4‐carboxybenzil groups followed by carboxyl groups activation and their coupling with amino‐terminated PNIPAm. Surface properties of the prepared structure and their switchable behavior were investigated using refractometry, wettability measurements, AFM in water, cyclic voltammetry, and pH‐ and temperature‐dependent Z‐potential measurements. The structure enables effective entrapment and SERS detection of azo dyes, significant reduction of minimal detectable concentration of target molecules, and a detection limit down to femtomolar concentrations. Excitation of plasmons on the well‐ordered surface structure also gives excellent reproducibility for SERS along the particular sample surface and as well as on different samples. Additionally, the reversible switching of wettability under repeated temperature changes on the gold plasmonic platform allows multiple uses of the developed system.

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“…The SPP supported structure can provide the homogenous electric field distribution over the surface. Therefore, the large area electromagnetic field enhancement occurs at local plasmon‐related regions due to the excitation and propagation of surface plasmons . Among some of the significant earlier attempts, Buividas et al demonstrated fabrication of ripple structures on sapphire (Al 2 O 3 ) achieved using fs laser ablation.…”

Section: Introductionmentioning

confidence: 99%

Surface‐enhanced Raman scattering studies of gold‐coated ripple‐like nanostructures on iron substrate achieved by femtosecond laser irradiation in water

Byram

Moram

Soma

2019

J Raman Spectroscopy

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During the past several years, numerous efforts have been accomplished on designing efficient surface‐enhanced Raman scattering (SERS) substrates with high sensitivity, good reproducibility, and recyclable nature. However, it still remains a significant challenge to realize all these qualities in a single substrate. We have fabricated ripple‐like nanostructures (NSs) on Iron (Fe) substrate using femtosecond (fs) laser irradiation of Fe target in distilled water. These ripple‐like structures had periodicities in the range of ~90–190 nm, which was confirmed from the analysis of field emission scanning electron microscope (FESEM) data. We subsequently deposited a thin layer of gold on these ripple‐like Fe NSs using thermal evaporation. Later, these coated NSs were effectively utilized as SERS substrates for methylene blue (MB) detection and were found to be sensitive evident from the data obtained at a very low concentration of 500pM. Furthermore, we observed that the SERS signal variations on the substrate were <11.2% indicating the reproducible nature of these substrates. Additionally, we demonstrate that these substrates can be reused (we establish this for three times consecutively) by detecting malachite green (MG) and an explosive molecule (picric acid, PA) followed by the mixture compound (Rhodamine 6G+MB) through employment of simple cleaning procedures. The detected molecular concentrations in terms of masses were found to be 3.2 pg, 36.5 pg, and 23 ng for MB (for a concentration of 500pM), MG (for a concentration of 5nM), and PA (for a concentration of 5μM), respectively. Furthermore, these Fe NSs exhibited superior batch‐to‐batch reproducibility with a relative standard deviation (RSD) value of ~l4%. The proposed method of fabricating ripple structures as SERS platforms are highly feasible, reliable, and have great potential for on‐site detection of several analyte molecules with an easily transportable Raman spectrometer.

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Surface Plasmon Polaritons on Silver Gratings for Optimal SERS Response

Cited by 67 publications

References 39 publications

Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

Ultrasensitive and reproducible SERS platform of coupled Ag grating with multibranched Au nanoparticles

Large‐Scale, Ultrasensitive, Highly Reproducible and Reusable Smart SERS Platform Based on PNIPAm‐Grafted Gold Grating

Surface‐enhanced Raman scattering studies of gold‐coated ripple‐like nanostructures on iron substrate achieved by femtosecond laser irradiation in water

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