Electrochemical tuning the optical properties of crystalline colloidal arrays composed of poly(3,4-ethylenedioxythiophene) coated silica particles

Electrically responsive photonic crystals: a review

“…35 The same approach of doping/dedoping of polymers was applied by Norton et al with crystal colloidal arrays (see section 4 for a detailed discussion) of PEDOTcoated silica particles, in order to modify the redox state of polymeric shell and, as a consequence, its refractive index. 55,56 Upon applying negative voltages, a decrease of ca. 60 % of the peak was observed, although the reflection wavelength shift was 40 modest (less than 10 nm).…”

Template approaches to conjugated polymer micro- and nanoparticles

“…By modulating the redox state of the polymer, 45 the effective refractive index of the film can be changed, which in turn affects the position and intensity of the photonic bandgap. 46 This type of electrochromic switching of the photonic bandgap position may lead to the production of robust, switchable, and color-tunable display technologies.…”

Colloidal nanocomposite particles: quo vadis?

“…More recently, the colloidal crystals formed by these silica--PEDOT nanocomposite particles were encapsulated in a hydrogel matrix and incorporated into a working electrode in order to tune the optical properties of the crystalline array by manipulation of the PEDOT redox state. 51 Foulger and co-workers have also used PEDOT--silica and polyaniline--silica nanocomposite particles with 'raspberry' morphologies as the electrochromic layer in the fabrication of electro-optic devices. 52 A unique 'daisy' morphology was observed by Reculusa et al for the synthesis of silica--polystyrene nanocomposites.…”