Noble metallic nanostructures: preparation, properties, applications

Atanasov, P.A.; Nedyalkov, N.N.; Dikovska, A.; Nikov, Ru; Amoruso, S.; Wang, X.; Hirano, Kohshi; Shimizu, Hisashi; Terakawa, Mitsuhiro; Obara, Minoru

doi:10.1088/1742-6596/514/1/012024

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…Figure shows in detail the topography of the gold layer coating a flat and a nanostructured polymer film and constituted by gold nanoparticles with sizes of up to a few nanometers. Noble metal nanoparticles obtained by PLD have been previously shown to enhance the Raman signal, and this effect was attributed to the relatively high fraction of “hot spots,” localized in the junctions . In our case, the enhancement by eight orders of magnitude of the Raman signal can be attributed to the large number of hot spots in a highly packed nanoparticle metal layer.…”

Section: Resultssupporting

confidence: 60%

Laser‐induced surface structures on gold‐coated polymers: Influence of morphology on surface‐enhanced Raman scattering enhancement

Rebollar

Hernández

Sanz

et al. 2015

J of Applied Polymer Sci

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The fabrication of highly sensitive and reproducible substrates for Surface-Enhanced Raman Scattering (SERS) remains a challenging scientific and technological issue. In this work, laser-induced periodic surface structures are generated on poly(trimethylen terephthalate) films upon laser irradiation with the linearly polarized beams of a Nd:YAG laser (4th harmonic, 266 nm), an ArF excimer laser (193 nm), and a Titanium:sapphire laser (795 nm), resulting in periods close to the laser wavelength when irradiating at normal incidence, and larger periods for different angles of incidence. Additional irradiation with a circularly polarized beam at 266 nm produces superficial circular structures. The nanostructured polymers are coated with a nanoparticle assembled gold layer by pulsed laser deposition at 213 nm. The capabilities of these substrates for SERS are evaluated using benzenethiol as a test molecule and different degrees of Raman signal enhancement are observed depending on the nanostructure type. The highest enhancement factor is obtained by for nanostructured substrates with the highest values of period, depth, and roughness.

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Section: Resultssupporting

confidence: 60%

Laser‐induced surface structures on gold‐coated polymers: Influence of morphology on surface‐enhanced Raman scattering enhancement

Rebollar

Hernández

Sanz

et al. 2015

J of Applied Polymer Sci

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“…In particular, pulsed laser ablation of solid targets in different environments, for example, vacuum, background gas, or liquid, has become an attractive method for the generation of NPs and deposition of NPs‐assembled materials . Among the successfully applied techniques, one can mention the ns‐laser deposition of thin metal films and the postdeposition structuring . The nanostructuring of thin metal films by excimer laser pulses has been introduced as a technique for production of NPs on different substrates .…”

Section: Introductionmentioning

confidence: 99%

SERS analyses of thiamethoxam assisted by Ag films and nanostructures produced by laser techniques

Atanasov

Nedyalkov

Nikov

et al. 2017

J Raman Spectroscopy

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This study deals with the use of laser techniques for preparation of advanced Ag nanostructure on quartz substrates that can be applied in high‐resolution analyses, namely, surface enhanced Raman spectroscopy (SERS). The active system was a two dimensional array of nanoparticles produced by laser annealing of thin silver film. The optical and morphological properties of the nanostructure were compared with those of an as deposited thin film in order to estimate their role in the detection efficiency. The activity of the structures fabricated as substrates for SERS of usually applied in agricultural medicine small quantities of Aktara 25 BG (thiamethoxam) insecticide was tested. To the best of our knowledge, SERS spectra of Aktara 25 BG are presented for the first time. The minimum detected concentration of thiamethoxam was evaluated to be in the order of μg/ml. The simple fabrication method and demonstrated efficiency focus the presented study to direct bearing on the human health and food quality area as a way of assisting the detection of small amounts or residue of harmful pollutants.

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“…8–10 Au and Ag nanostructures (NSs) have been obtained by laser ablation and laser annealing of thin films, a method for fabricating two- and three-dimensional (2D and 3D) nanostructures with controllable characteristics. 11–16…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Spectroscopy (SERS) of Mancozeb and Thiamethoxam Assisted by Gold and Silver Nanostructures Produced by Laser Techniques on Paper

et al. 2018

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Advanced gold (Au) and silver (Ag) nanostructures were produced by laser techniques on printer paper substrate. Surface-enhanced Raman spectroscopy (SERS) analyses of the fungicide mancozeb (Dithane DG) and insecticide thiamethoxam (Aktara 25 BG) in quantities smaller than usually applied in agricultural medicine were performed for the first time assisted by the structures fabricated. The investigations and results show an easy alternative and cheap way to detect small amounts or residue of harmful environmental pollutants, which has a direct bearing on food quality and thus on human health.

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Noble metallic nanostructures: preparation, properties, applications

Cited by 10 publications

References 20 publications

Laser‐induced surface structures on gold‐coated polymers: Influence of morphology on surface‐enhanced Raman scattering enhancement

Laser‐induced surface structures on gold‐coated polymers: Influence of morphology on surface‐enhanced Raman scattering enhancement

SERS analyses of thiamethoxam assisted by Ag films and nanostructures produced by laser techniques

Surface-Enhanced Raman Spectroscopy (SERS) of Mancozeb and Thiamethoxam Assisted by Gold and Silver Nanostructures Produced by Laser Techniques on Paper

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