Twinned nanoparticle structures for surface enhanced Raman scattering

Novák, J.; Eliáš, P.; Hasenöhrl, S.; Laurenčíková, A.; Kováč, J.; Urbancová, Petra; Pudiš, Dušan

doi:10.1016/j.apsusc.2020.146548

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…The described system was applied to the sensing of a typical Raman reporter molecule, rhodamine 6G, but the authors do not refer to any EF or detection limit. In the next paper, a similar system was examined, and EF was determined on 10 6 towards R6G molecules [53]. The highest SERS activity was detected on the samples covered by the smallest Ag nanoparticles, due to fact of "hot-spot" formation in the gap between nanoparticles.…”

Section: Modification By Plasmonic Noble Metal Nanoparticle Depositionmentioning

confidence: 97%

Plasmonic Modification of Epitaxial Nanostructures for the Development of a Highly Efficient SERS Platform

Dumiszewska,

Michałowska,

Nozka

et al. 2023

Crystals

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Epitaxy is the process of crystallization of monocrystalline layers and nanostructures on a crystalline substrate. It allows for the crystallization of various semiconductor layers on a finite quantity of semiconductor substrates, like GaAs, InP, GaP, InGaP, GaP, and many others. The growth of epitaxial heterostructures is very complicated and requires special conditions and the precise control of the growth temperature, the pressure in the reactor, and the flow of the precursors. It is used to grow epitaxial structures in lasers, diodes, detectors, photovoltaic structures, and so on. Semiconductors themselves are not suitable materials for application in surface-enhanced Raman spectroscopy (SERS) due to poor plasmonic properties in the UV/VIS range caused by missing free electrons in the conduction band due to the existing band gap. A plasmonic material is added on top of the nanostructured pattern, allowing for the formation of mixed photon–plasmon modes called localized surface plasmon-polaritons which stand behind the SERS effect. Typically, gold and silver are used as functional plasmonic layers. Such materials could be deposited via chemical or physical process. Attention has also been devoted to other plasmonic materials, like ones based on the nitrides of metals. The SERS performance of a functional surface depends both on the response of the plasmonic material and the morphology of the underlying semiconductor epitaxial layer. In the context of SERS, epitaxial growth allows for the fabrication of substrates with well-defined 3D nanostructures and enhanced electromagnetic properties. In this work, we described the possible potential plasmonic modification, composed of various coatings such as noble metals, TiN, and others, of well-developed epitaxial nanostructures for the construction of a new type of highly active SERS platforms. This abstract also highlights the role of epitaxial growth in advancing SERS, focusing on its principles, methods, and impact. Furthermore, this work outlines the potential of epitaxial growth to push the boundaries of SERS. The ability to design substrates with tailored plasmonic properties opens avenues for ultralow concentration detection.

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Section: Modification By Plasmonic Noble Metal Nanoparticle Depositionmentioning

confidence: 97%

Plasmonic Modification of Epitaxial Nanostructures for the Development of a Highly Efficient SERS Platform

Dumiszewska,

Michałowska,

Nozka

et al. 2023

Crystals

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“…In recent years, there has been significant attention focused on plasmonic structures thanks to the desirable resonant properties of metal/dielectric interfaces arising from the ability of the concentration of electromagnetic energy at sub-wavelength scale [ 1 , 2 ]. At metal surfaces of plasmonic structures, a collective oscillation of conduction electrons—called surface plasmons (SPs)—as a response to incident electromagnetic wave occurs [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

et al. 2021

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In this paper, we present a two-dimensional surface plasmon resonance structure for refractive index sensing of liquid analytes. The polymer structure was designed with a period of 500 nm and prepared in a novel IP-Dip polymer by direct laser writing lithography based on a mechanism of two-photon absorption. The sample with a set of prepared IP-Dip structures was coated by 40 nm thin gold layer. The sample was encapsulated into a prototyped chip with inlet and outlet. The sensing properties were investigated by angular measurement using the prepared solutions of isopropyl alcohol in deionized water of different concentrations. Sensitivity of 478–617 nm per refractive index unit was achieved in angular arrangement at external angle of incidence of 20°.

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