A facile method for the synthesis of highly monodisperse silica@gold@silica core–shell–shell particles and their use in the fabrication of three-dimensional metallodielectric photonic crystals

A bottom-up fabrication method for the production of visible light active photonic crystals

“…All of these data were obtained from the optical data by solving the Bragg-Snell relation for photonic crystals: ( ) where λ max is the wavelength maximum of the reflectance band, d is the lattice spacing, n eff is the effective refractive index of the photonic crystal, and θ is the angle of incidence of the impinging electromagnetic radiation to the photonic crystal surface normal. 47,48 Furthermore, above 30° incidence, the simultaneous multiple Bragg diffraction-induced multiple Bragg-wave coupling from the (111) and (200) planes of the inverse opal resulted in the modification of the stop-bands 49 (not shown here). As a result the Δλ/λ further increased to >12% and >30% for ncSi-SIO-1 and ncSi-SIO-2 respectively from that of ~8% for SIO.…”

Extending Surface‐Enhanced Raman Spectroscopy to Liquids Using Shell‐Isolated Plasmonic Superstructures

“…The SiO 2 spheres were functionalized with (3‐mercaptopropyl)trimethoxysilane (MPTMS) (95 %, Alfa Aesar), (3‐aminopropyl)trimethoxysilane (APTMS) (99 %, Sigma–Aldrich), or poly(ethyleneimine) (PEI) (50 % in H 2 O, Sigma–Aldrich) by first adjusting the pH of the solution to ≈11 using NaOH, and then adding appropriate amounts of functionalizing agent, following the procedures by Claesson et al . and Padmanabhan et al …”

“…The obtained SiO 2 spheres were washed with EtOH several times, and finally redispersed in MQ. The SiO 2 spheres were functionalized with (3-mercaptopropyl)trimethoxysilane (MPTMS) (95 %, Alfa Aesar), (3-aminopropyl)trimethoxysilane (APTMS) (99 %, Sigma-Aldrich), or poly(ethyleneimine) (PEI) (50 %i nH 2 O, Sigma-Aldrich) by first adjusting the pH of the solution to % 11 using NaOH, and then adding appropriate amounts of functionalizing agent, following the procedures by Claesson et al [39] and Padmanabhan et al [40] Au/SiO 2 superstructures were synthesized by adding as mall amount of functionalized SiO 2 spheres to ad iluted Au NP dispersion. Typically 2.5 mL of an as-prepared Au NP dispersion was added to 2.5 mL of MQ.…”

Synthesis, optical properties, and amplified spontaneous emission of hybrid Ag–SiO2–CdTe nanocomposite

“…Ag-SiO 2 core-shell shows higher absorption intensity more than 31% with broadening of 11 nm in full width at half maximum (FWHM). These enhancements were attributed to the presence of dielectric silica shell layer which has the potential to modify the plasmonic properties[13].…”