Plasmon resonances in nanoparticle system consisting of differentmaterials

Quaternized chitosan mediated assembly of gold nanoparticles multilayers

“…AuNps are embedded in a matrix and are therefore subject to average polarization field due to the matrix and the particles, and the factor responsible for the red-shift is the volume fraction of gold nanoparticles included in the medium that depends on the AuNps adsorption time. The plot of the maximal absorbance (Abs max ) versus the square root of the adsorption time presents a good linear relationship (R 2 = 0.996) up to 90 min, which indicates that AuNPs adsorption on Q/QCHI surface follows a diffusion-controlled kinetics in the early stages [28], (Figure S2 of supporting information).…”

“…1 shows the UV-Vis spectra of Q/QCHI (dashed lines) and Q/(QCHI-AuNPs) (solid lines), obtained by increasing the contact time of the colloidal solution with the surface from 15 to 120 min. After the adsorption of AuNPs, one broad band is observed that corresponds to the SPR of the AuNPs [28]. In comparison with AuNPs in solution, the adsorption on the polymer produces a red-shift of 7 nm as consequence of the difference of the dielectric constant of both medium.…”

Fano resonance of nanoparticles embedded in Fabry-Perot cavities

“…For F-P mode stimulation, the uniform slab sandwiched between silver films is with same thickness and with an effective dielectric constant. For the dipole-like mode, the silver nanosphere is embedded in a uniform background dielectric of 6. In order to understand the properties of the plamon modes, which are oscillations of the conduction electrons in metals coupled to the electromagnetic field, boundary integration method [18,25,26,28] was used to determine the charge distribution on the silver nanosphere surface. The insertion in Fig.…”