Abstract We report on one-step hybridization of silver, gold and palladium nanoparticles from solution onto exfoliated two-dimensional (2D) Ti 3 C 2 titanium carbide (MXene) nanosheets. The produced hybrid materials can be used as substrates for surface-enhanced Raman spectroscopy (SERS). An approximate analytical approach is also developed the calculation surface plasmon resonance (SPR) frequency immersed in a medium, near interface two dielectric media with different constants. obtained...

Noble metal (gold or silver) nanoparticles patterned films are typically used as substrates for surface-enhanced Raman spectroscopy (SERS). Two-dimensional (2D) carbides and nitrides (MXenes) exhibit unique electronic optical properties, including metallic conductivity plasmon resonance in the visible near-infrared range, making them promising candidates a wide variety of applications. Herein, we show that 2D titanium carbide, Ti3C2Tx, enhances signal from organic dyes on substrate solution....

Resonators of surface plasmons are discussed in this review. Any material supporting the excitation plasmons, either by light, or electron beams can be used for designing a resonator. Despite number materials being restricted to small number, noble metals, some two-dimensional as graphene, transition metal oxides, and several highly doped semiconductors have been plasmonic applications. Isolated coupled nanoparticles, arrays particles on substrates, nanoparticle suspensions, alternated...

Under certain conditions of the incident light polarization direction a Fano resonance arises in small gold nanorods arranged H-like configuration. This stems from coupling between bright dipole plasmon mode excited horizontal rod and dark quadrupole modes both vertical rods. We investigate these surface modes, analyze dependence on geometry parameters such as size interparticle separation, refractive index embedding medium. To describe degree this energy transfer, we introduce new...

An approximate analytical approach is developed for the calculation of surface plasmon frequency a system interacting nanospheres arbitrary values interparticle distances. In addition to having simple and physically clear form, final formulae also describe adequately dependence resonance frequencies on parameters problem. The electric field each spheres approximated by dipole, placed at point, with respect which tensor quadrupole moment charge distribution vanishes. Because this procedure,...

Since the discovery of optical properties two-dimensional (2D) titanium carbide (MXene) conductive material, an ever increasing interest has been devoted towards understanding it as a plasmonic substrate or nanoparticle. This noble metal-free alternative holds promise not only due to its lower cost but also 2D nature, hydrophilicity and apparent bio-compatibility. Herein, most widely studied Ti3C2Tx MXene nanosheets are theoretically analyzed absorption cross-sections calculated exploiting...

A theory of surface plasmon radiation damping in a system coupled spherical metallic nanoparticles is developed, and simple formula for the line width obtained first time. It shown that as result frequency redshift, notable reduction rate takes place. For small separations, narrows by factor 3 compared to large separations. The expanded case nanoparticle placed near an interface two dielectric media. dependence redshift on particle–interface separation are calculated. revealed both cases,...

Semi-analytical method of surface plasmon frequency calculation for the system two almost touching coupled dielectric coated metallic nanospheres is presented.The allows transforming problem to numerical solution simple algebraic equations arbitrary values parameters -particle radius, distance between sphere centers, permittivity matrix, dielectrics and metals.It especially easy get obvious graphical solution.The frequencies longitudinal transversal oscillations are calculated good agreement...

Two-photon absorption in GaAs/Ga1−xAlxAs with a realistic band structure and finite offsets ΔEc, ΔEv is analyzed theoretically compared experiment. This approach allows us to explain the known experimental data choose most value for ratio ΔEc/ΔEv. It shown that thin quantum wells number of possible two-photon optical transitions well decreases which strongly affects polarization dependence heterostructures.

We consider the problem of surface plasmon (SP) oscillations in a pair coupled spherical metallic nanoparticles (MNP) analytically and compare results with those obtained experimentally as well by numerical methods: discrete dipole approximation (DDA), boundary integral method T-matrix. The calculation SP frequencies pairs MNPs size less than wavelength is reduced to electrostatic solved analytically. Such reduction becomes impossible when system comparable retardation effects this case must...

Abstract In this communication we calculate the TPI cross-section for pump-probe scheme in Au, Ag and Na neutral clusters high refractive index environment. The pump photon energy is chosen to be close surface plasmon (SP) of considered clusters. Since interband transition exceeds SP resonance energy, main contribution into these comes from transitions. Au threshold very resonance, assisted attenuated. calculations are performed by separating coordinates electrons corresponding collective...