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Abstract

The present invention relates to a process for preparing poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) particles at least comprising the steps:

a) providing a mixture comprising poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate in a solvent at least comprising water;b) forming one or more PEDOT:PSS droplets by introducing the mixture from process step a) into an organic solvent A, wherein the aqueous PEDOT:PSS mixture forms the droplet interior and the organic solvent A forms the droplet exterior;c) contacting the PEDOT:PSS droplets obtained from process step b) with a coagulating solution comprising a curing agent and at least one further solvent B, the density of the coagulating solution being greater than the density of the organic solvent A and less than the density of the aqueous poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate mixture; with curing of the PEDOT:PSS droplets to PEDOT:PSS particles. Furthermore, the present invention discloses spherical PEDOT:PSS particles without further mechanically solidifying substances and the use of the particles, for example, as cell culture microcarriers or suspension electrodes.

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First Claim