Localized surface plasmon resonance tuning via nanostructured gradient Ag surfaces

Hanuš, Jan; Libenská, Hana; Khalakhan, Ivan; Kuzminova, Anna; Kylián, Ondřej; Biederman, Hynek

doi:10.1016/j.matlet.2016.12.044

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…To highlight the advantages arising from the combination of silver magnetron sputtering with the deposition of Ag NPs by means of GAS, the first step of this study was to separately characterise the coatings prepared by these two techniques. In agreement with previous studies [39][40][41][42], the magnetron sputtering results in the formation of Ag nano-islands whose size and separation depend on the time by which the substrate is exposed to the flux of incoming silver atoms emitted from the sputtered target. As seen in Figure 2(a), the position on the sample that corresponds to a low fluence of silver is characterised by a large number of well-separated small Ag nano-islands.…”

Section: Resultssupporting

confidence: 92%

Double Plasmon Resonance Nanostructured Silver Coatings with Tunable Properties

Kuzminova

Solař

Kúš

et al. 2019

Journal of Nanomaterials

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Plasmonic materials that exhibit dual or multiple localised surface plasmon resonances (LSPRs) due to their high application potential in biosensing and biodetection are gaining increasing attention. Here, we report on the novel strategy suitable for the production of silver nanostructured dual-LSPR coatings. This fully vacuum-based technique uses a magnetron sputtering of Ag and a gas aggregation source of silver nanoparticles. It is shown that when combined, produced Ag nano-islands and nanoparticles exhibit due to their different sizes and shapes two independent LSPRs in the visible part of spectra. Furthermore, the intensities and positions of individual LSPR may be precisely controlled by the amount of sputter-deposited nano-islands and a number of Ag nanoparticles, which opens new possibilities for the tailor-made production of novel platforms for surface-enhanced spectroscopic biodetection.

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Section: Resultssupporting

confidence: 92%

Double Plasmon Resonance Nanostructured Silver Coatings with Tunable Properties

Kuzminova

Solař

Kúš

et al. 2019

Journal of Nanomaterials

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“…Depending on the deposition conditions (magnetron current, pressure, deposition time, etc.) various silver nanostructures are formed that range from individual separated nanoislands to interconnected Ag networks (e.g., [ 59 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 ]. ( d ) Deposition of Ag NPs by means of a gas aggregation source equipped with a silver target.…”

Section: Figurementioning

confidence: 99%

State-of-the-Art, and Perspectives of, Silver/Plasma Polymer Antibacterial Nanocomposites

2018

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Urgent need for innovative and effective antibacterial coatings in different fields seems to have triggered the development of numerous strategies for the production of such materials. As shown in this short overview, plasma based techniques arouse considerable attention that is connected with the possibility to use these techniques for the production of advanced antibacterial Ag/plasma polymer coatings with tailor-made functional properties. In addition, the plasma-based deposition is believed to be well-suited for the production of novel multi-functional or stimuli-responsive antibacterial films.

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“…Due to this, silver, gold and copper nanostructures are the most suitable metals for SEF as they exhibit LSPR in the visible spectral range. In addition, it is well known that the plasmon resonance properties of such metallic nanostructures can be controlled by optimizing the nanoparticle dimensions, their geometry and composition [13,[17][18][19][20]. Different spacing was used in the literature to keep the optimum distance, such as silicon oxides [6,13,16,21], polymers [22,23], proteins [11,24] or DNA strands [12,25,26].…”

Section: Introductionmentioning

confidence: 99%

“…These substrates hold great promise for analytical applications due to their SERS performance, excellent reproducibility, time stability, ease of preparation and cost effectiveness [28]. Moreover, this deposition procedure may be easily adapted for the fabrication of surfaces with LSPR conditions gradually changing along the sample length [17]. Their plasmonic properties, which may cover the whole visible spectral range, can be used for the identification of the best overlap of the absorption/emission band of the fluorophore with the LSPR maximum of the nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Magnetron-Sputtered Polytetrafluoroethylene-Stabilized Silver Nanoisland Surface for Surface-Enhanced Fluorescence

et al. 2020

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Surface-enhanced fluorescence (SEF) requires the absorption/emission band of the fluorophore, the localized surface plasmon resonance (LSPR) of the nanostructure and the excitation wavelength to fall in the same (or very close) spectral range. In this paper, we monitor the SEF intensity and lifetime dependence of riboflavin (vitamin B2) adsorbed on a spacer-modified Ag substrate with respect to the thickness of the spacer. The substrates were formed by silver nanoislands deposited onto magnetron-sputtered polytetrafluoroethylene (ms-PTFE). The spacer was formed by the ms-PTFE layer with the thickness ranging from ~5 to 25 nm. The riboflavin dissolved in dimethylsulfoxide (DMSO) at a 10 µM concentration forms, at the ms-PTFE surface, a homogeneous layer of adsorbed molecules corresponding to a monomolecular layer. The microspectroscopic measurements of the adsorbed layer were performed through a sessile droplet; our study has shown the advantages and limitations of this approach. Time-resolved fluorescence enabled us to determine the enhanced fluorescence quantum yield due to the shortening of the radiative decay in the vicinity of the plasmonic surface. For the 5 nm ms-PTFE layer possessing the largest (estimated 4×) fluorescence enhancement, the quantum yield was increased 2.3×.

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Localized surface plasmon resonance tuning via nanostructured gradient Ag surfaces

Cited by 11 publications

References 17 publications

Double Plasmon Resonance Nanostructured Silver Coatings with Tunable Properties

Double Plasmon Resonance Nanostructured Silver Coatings with Tunable Properties

State-of-the-Art, and Perspectives of, Silver/Plasma Polymer Antibacterial Nanocomposites

Magnetron-Sputtered Polytetrafluoroethylene-Stabilized Silver Nanoisland Surface for Surface-Enhanced Fluorescence

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