The assemblies of cross-linked gold nanoparticles (AuNP) attract lot of scientific attention due to feasible perspectives of their use for development of scaled contact electrodes. Here, we developed and tested method of solid-state formation of dimers created from small AuNP (~18 nm) cross-linked with 1.9-nonadithiol (NDT) molecules. The morphology of created coating of a glass surface and its optical-polarization properties have been studied in detail by combination of scanning electron microscopy, atomic force microscopy, UV-visible spectroscopy, and modulation-polarization spectroscopy.The modification of localized surface plasmon resonance (LSPR) of single AuNP and their assemblies were studied by measuring of the spectral characteristics of polarization difference at all stages of synthesis. The radiative and nonradiative modes of LSPR have been analyzed in detail at different angles of incidence light. This allowed establishing relation between surface morphology of the coating and its optical properties.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-017-2107-8) contains supplementary material, which is available to authorized users.

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Nanostructure porous films with arrays of gold nanoparticles (Au NPs) have been produced by pulsed laser deposition. Dispersion properties of surface plasmons have been studied by the modulation-polarization spectroscopy technique. The dispersion relations for radiative modes and two types of non-radiative modes of localized and propagating surface plasmons were obtained. The branches of propagating modes were characterized by negative group velocity caused by spatial dispersion of dielectric function. The propagating modes are caused by dipole-dipole interactions between adjacent Au NPs. The frequencies and relaxation parameters of surface plasmon resonances and the plasma frequencies for Αu NPs were obtained. The relation between the surface plasmon’s properties and formation conditions of films with arrays of Αu NPs is discussed.

A straightforward and effective spin-coating technique at 120 °C was investigated for the deposition of a thin nanoporous layer with antireflection properties onto glass and indium tin oxide (ITO) coated glass. A mixture of zeolite 3A powder and high iodine value vegetable oil was deposited, creating a carbonic paste with embedded nanoporous grains. Experimental results evidenced excellent broadband antireflection over the visible-near-infrared wavelength range (450–850 nm), with a diffuse reflectance value of 1.67% and 1.79%. Structural and optical characteristics stabilized over time. The results are promising for the accessible and cost-effective fabrication of an antireflective surface for optoelectronic devices.

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The influence of gold nanoparticles on the antireflection properties of a thin film of zeolite 3A has been investigated. A low-temperature technique combining zeolite deposition with pulsed-laser gold deposition was used for the fabrication of a composite thin film on a silicon substrate. Experimental results obtained by modulationpolarisation spectroscopy showed that the antireflection effects in polarised electromagnetic radiation can achieve a decreased degree of reflectivity in a wide spectral range due to the presence of plasmonic nanoparticles on the surface of the film.

This work reports the investigation of plasmonic effects in tin disulfide (SnS 2 ) nanostructured films obtained by the close-spaced vacuum sublimation method (CSS). Structural properties and phase composition of SnS 2 films were studied with the help of field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), Xray diffraction (XRD) and Raman spectroscopy. Surface morphology and optical polarization properties of SnS 2 films deposited at different substrate temperature were investigated by modulation-polarization spectroscopy (MPS). Surface plasmon resonances (SPR) with localized and polariton types were observed by measuring of angular and spectral characteristics of polarization difference. Radiative and nonradiative modes of surface plasmons have been analyzed at different light incident angles. The influence of surface morphology on resonant parameters of different types of SPR was studied. Correlation between the experimental results and theoretical calculations was established. The refractive and absorption indexes were found for the SnS 2 films at different substrate temperature.

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