Modification of plasmon resonance properties of noble metal nanoparticles inside the glass matrices

Koleva, M.; Nedyalkov, N.N.; Karashanova, Daniela; Atanasova, G.; Степанов, А. Л.

doi:10.1016/j.apsusc.2019.01.051

Cited by 13 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the laser annealing process, it is possible to reach heating and cooling rates exceeding 10 10 C/s. In [22], we have discussed the evaluation of the heating and cooling rates. The pulsed laser irradiation affects the surface areas of the processed material by means of very rapid thermal cycles under conditions generally far from thermodynamic equilibrium [23].…”

Section: Resultsmentioning

confidence: 99%

Effect of laser annealing on the properties of Ag/ZnO nanostructures

Koleva

Dikovska

Nedyalkov

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Ag/ZnO nanostructures were synthesized using pulsed laser deposition (PLD) in open air (at atmospheric pressure). The deposition was carried out by a Nd:YAG laser, with the Ag layer composed of nanoparticles grown on SiO2 (001) substrates by the laser wavelength of 355 nm; this layer was covered by ZnO deposited by using the laser wavelength of 1064 nm. The samples were laser annealed, which led to a modification of the nanoparticles. The nanocomposites produced were characterized by TEM, UV-Vis and PL spectroscopy. The annealing procedures influence the optical properties of the Ag/ZnO nanocomposites. The laser annealing under certain parameters changes the emission behavior of the Ag/ZnO nanocomposite heterostructures. By employing localized surface plasmon resonance (LSPR), the near band edge (NBE) emission intensity of the ZnO films composed of nanoparticles was varied. An enhancement of the UV emission located at about 383 nm, commonly attributed to an excitonic transition, was registered after laser annealing with one pulse at the wavelength of 355 nm. The results obtained demonstrate that the annealing of Ag/ZnO composite nanostructures plays a key role in tuning the PL performance of a semiconductor material where an LSPR occurs.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of laser annealing on the properties of Ag/ZnO nanostructures

Koleva

Dikovska

Nedyalkov

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…It has been observed that the SPR peak position is shifted either toward the longer or shorter wavelength side by a magnitude of 100–200 nm per refractive index unit as the dielectric function of the medium in the vicinity of a simple spherical or elliptical‐shaped NP is changed . A shift in the SPR peak position per refractive index unit is defined as the shift in nm that occurs when the medium refractive index in the vicinity of NP is increased or decreased by one . The magnetic field associated with SPR possesses absorbing, scattering, and near‐field components that have applications in photocatalysis, Raman scattering, fluorescence, and second and third harmonic generation for molecules present in the vicinity of noble metal NPs.…”

Section: Factors Affecting Photoactivity Of Spr‐assisted Semiconductorsmentioning

confidence: 99%

Surface Plasmonic‐Assisted Photocatalysis and Optoelectronic Devices with Noble Metal Nanocrystals: Design, Synthesis, and Applications

Zada

Muhammad

Ahmad

et al. 2019

Adv Funct Materials

233

134

View full text Add to dashboard Cite

The surface plasmon resonance (SPR) of noble metals is known to improve the efficiency of various processes and devices. The photocatalytic process is the production of fuels and storage of solar photons in chemical bonds without imposing harmful threats to the environment. Photovoltaics are other devices utilizing solar energy for electrical energy. Similarly, other optoelectronic devices like photodetectors absorb photons and convert it into charges via electron–hole dissociation processes. In contrast, light‐emitting optoelectronic devices work based on the phenomenon of charge recombination to produce light. All these devices, however, have efficiency limitations, which impede the application of novel functional materials in these devices. A more direct approach is the utilization of noble metals and their complexes, which significantly enhance the efficiencies of these devices by SPR. This article highlights recent works and applications of noble metals by SPR‐enhanced photocatalysis for hydrogen evolution from water, CO2 conversion into useful compounds, and oxidation of hazardous pollutants. In addition, the plasmon‐enhancement of optoelectronic devices is summarized. Several possible mechanisms that have been previously reported in the literature are discussed in this work, with particular emphasis on different features of these mechanisms involving devices that are not highlighted and therefore need more attention.

show abstract

“…The technique itself involves the ablation of a metal target via fast pulses of a high-energy laser and the deposition of the produced nanosheets of G on the substrate. The method typically produces films that adhere well onto the substrate, which is a crucial factor governing the biodegradation process, and it also allows for the tuning of the film thickness by controlling the exposure time. , Prior studies demonstrated the applicability of this method for the surface modification of Ti-6Al-7Nb implants with calcium phosphate. Unlike the thermally treated Ti alloy, such coated implants were bioactive, as demonstrated by the apatite layers forming on them after immersion in SBF .…”

Section: Introductionmentioning

confidence: 99%

Taking Hydroxyapatite-Coated Titanium Implants Two Steps Forward: Surface Modification Using Graphene Mesolayers and a Hydroxyapatite-Reinforced Polymeric Scaffold

Fathi

Ahmed

Afifi

et al. 2020

ACS Biomater. Sci. Eng.

View full text Add to dashboard Cite

Coating with hydroxyapatite (HAP) presents a mainstream strategy for rendering bioinert titanium implants bioactive. However, the low porosity of pure HAP coatings does not allow for the infiltration of the surface of the metallic implant with the host cells. Polymeric scaffolds do enable this osseointegration effect, but their bonding onto titanium presents a challenge because of the disparity in hydrophilicity. Here, we demonstrate the inability of a composite scaffold composed of carbonated HAP (CHAP) nanoparticles interspersed within electrospun ε-polycaprolactone (PCL) nanofibers to bind onto titanium. To solve this challenge, an intermediate layer of graphene nanosheets was deposited in a pulsed laser deposition process, which facilitated the bonding of the scaffold. The duration of the deposition of graphene (0, 5, 10, 15, and 20 min) and the thickness of its mesolayer affected numerous physical and chemical properties of the material, including the surface atomic proportion of carbon bonds, the orientation and interlinking of the polymeric nanofibers, and the surface roughness, which increased in direct proportion with the thickness of the graphene mesolayer. Because the polymeric scaffold did not adhere onto the surface of pure titanium, no cells were detected growing on it in vitro. In contrast, human fibroblasts adhered, spread, and proliferated well on all the substrates sputtered with both graphene and the composite scaffold. The orientations of cytoskeletal filopodia and lamellipodia were largely determined by the topographic orientation of the nanofibers and the geometry of the surface pores, attesting to the important effects that the presence of a scaffold has on the cellular behavior. The protection of titanium from corrosion in the simulated body fluid (SBF) was enhanced by coating with graphene and the composite scaffold, with the most superior resistance to the attack of the corrosive ions being exhibited by the substrate subjected to the shortest duration of the graphene deposition because of the highest atomic ratio of C–C to C–O bonds detected in it. Overall, some properties of titanium, such as roughness and wettability, were improved monotonously with an increase in the thickness of the graphene mesolayer, while others, such as cell viability and resistance to corrosion, required optimization, given that they were diminished at higher graphene mesolayer thicknesses. Nevertheless, every physical and chemical property of titanium analyzed was significantly improved by coating with graphene and the composite scaffold. This type of multilayer design evidently holds a great promise in the design of biomaterials for implants in orthopedics and tissue engineering.

show abstract

Modification of plasmon resonance properties of noble metal nanoparticles inside the glass matrices

Cited by 13 publications

References 41 publications

Effect of laser annealing on the properties of Ag/ZnO nanostructures

Effect of laser annealing on the properties of Ag/ZnO nanostructures

Surface Plasmonic‐Assisted Photocatalysis and Optoelectronic Devices with Noble Metal Nanocrystals: Design, Synthesis, and Applications

Taking Hydroxyapatite-Coated Titanium Implants Two Steps Forward: Surface Modification Using Graphene Mesolayers and a Hydroxyapatite-Reinforced Polymeric Scaffold

Contact Info

Product

Resources

About