Fluorescence Properties of Photonic Crystals Doped with Perylenediimide

Abstract

This study aims to present the fabrication of colloidal photonic crystals (PC) with increased fluorescence properties. The use of a highly fluorescent perylenediimide derivate (PDI) during the soap-free emulsion polymerization of styrene-acrylic acid resulted in monodisperse core-shell particles which allowed the fabrication of PC films. The properties of the hybrid material were studied in comparison with hybrid materials obtained by impregnation of films with chromophore solutions. In both cases an increase of the fluorescence response was observed in addition to a blue shift for the PDI core particles, proving the incorporation of the dye inside the copolymer particles.

Coloring of Polystyrene Nanoparticles Assembling on Graphene in Aqueous Solution

“…Hence, SGPC in solution displayed the structural color in the same way as the self‐assembled PC films prepared by colloidal crystals. The peak position caused by the optical stop‐band in colloidal crystals can be calculated approximately by using the equation for Bragg diffraction under normal incidence:where λ is the peak position, d is the diameter of the PS nanoparticles (170 nm for PS in SGPC), and n ps and n void are the refractive indices of PS nanoparticles ( n ps = 1.550) and of the media occupying the voids within the SGPC, respectively. The filling factor for ideal face‐centered cubic packing is f = 0.74.…”

“…Hence, SGPC in solution displayed the structural color in the same way as the self-assembled PC fi lms prepared by colloidal crystals. The peak position caused by the optical stop-band in colloidal crystals can be calculated approximately by using the equation for Bragg diffraction under normal incidence: [ 30 ]…”

Hybrid Material Synthesis Based on Polymer Photonic Crystals Core and Magnetite Particles Shell

“…Based on their optical behavior, the PPCs films were intensively used in chemosensing devices in order to amplify the photoluminiscent properties of various organic compounds …”

“…[9,10] Based on their optical behavior, the PPCs films were intensively used in chemosensing devices in order to amplify the photoluminiscent properties of various organic compounds. [11,12] More than that, introducing defects in PPCs structure in order to modify the PBG and control the optical properties of the crystalline array were always challenging. For this reason, many techniques involving changes in pH, [13] temperature, [14] light irradiation, [15] physical and/or chemical reactions [16,17] were investigated in order to obtain materials with switchable bandgaps.…”

Photoactive spherical colloids for opal photonic crystals

“…Therefore, it appears more effective to incorporate these active species within the particles before the CPhCs fabrication. In this respect, polymer particles with incorporated dyes can be obtained directly by emulsion polymerization or by a swelling and deswelling process of the already synthesized colloids .…”