Anisotropic Polymer Nanoparticles with Tunable Emission Wavelengths by Intersegmental Chain Packing

Perez, Julian D. Ruiz; Mecking, Stefan

doi:10.1002/ange.201701000

Cited by 8 publications

(1 citation statement)

References 29 publications

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“…[ 24 ] Generally, the Suzuki‐Miyaura coupling reaction is used as this reaction is known to be robust when conducted in aqueous media. [ 25 ] The NP dispersions prepared by this approach have largely been used to investigate NP self‐assembly and optical behavior, [ 26 ] or as stable colloidal dispersions for use in photocatalytic applications. [ 27 ] However, the preparation of high‐performance semiconducting polymers by a mini‐emulsion polymerization to form aqueous NP dispersions for direct processing into semiconducting thin films for OSC‐based electronic devices has yet to be demonstrated.…”

Section: Figurementioning

confidence: 99%

Organic Semiconductors Processed from Synthesis‐to‐Device in Water

et al. 2020

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Organic semiconductors (OSCs) promise to deliver next‐generation electronic and energy devices that are flexible, scalable and printable. Unfortunately, realizing this opportunity is hampered by increasing concerns about the use of volatile organic compounds (VOCs), particularly toxic halogenated solvents that are detrimental to the environment and human health. Here, a cradle‐to‐grave process is reported to achieve high performance p‐ and n‐type OSC devices based on indacenodithiophene and diketopyrrolopyrrole semiconducting polymers that utilizes aqueous‐processes, fewer steps, lower reaction temperatures, a significant reduction in VOCs (>99%) and avoids all halogenated solvents. The process involves an aqueous mini‐emulsion polymerization that generates a surfactant‐stabilized aqueous dispersion of OSC nanoparticles at sufficient concentration to permit direct aqueous processing into thin films for use in organic field‐effect transistors. Promisingly, the performance of these devices is comparable to those prepared using conventional synthesis and processing procedures optimized for large amounts of VOCs and halogenated solvents. Ultimately, the holistic approach reported addresses the environmental issues and enables a viable guideline for the delivery of future OSC devices using only aqueous media for synthesis, purification and thin‐film processing.

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Section: Figurementioning

confidence: 99%

Organic Semiconductors Processed from Synthesis‐to‐Device in Water

et al. 2020

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Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

et al. 2017

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Template-free fabrication of non-spherical polymeric nanoparticles is desirable for various applications,b ut has had limited success owing to thermodynamic favorability of sphere formation. Herein we present as imple way to prepare cubic nanoparticles of blockcopolymers by self-assembly from aqueous solutions at room temperature.Nanocubes with edges of 40-200 nm are formed spontaneously on different surfaces upon water evaporation from micellar solutions of triblock copolymers containing ac entral poly(ethylene oxide) block and terminal trimethylene carbonate/dithiolane blocks.T hese polymers self-assemble into 28 AE 5nmmicelles in water.Upon drying, micelle aggregation and ak inetically controlled crystallization of central blocks evidently induce solid cubic particle formation. An approach for preserving the structures of these cubes in water by thiol-or photo-induced crosslinking was developed. The ability to solubilizeamodel hydrophobic drug, curcumin, was also explored.

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Flower‐Like Colloidal Particles through Precipitation Polymerization of Redox‐Responsive Liquid Crystals

et al. 2021

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We report on the synthesis of monodisperse,flowerlike,liquid crystalline (LC) polymer particles by precipitation polymerization of aL Cm ixture consisting of benzoica cidfunctionalizeda crylates and disulfide-functionalized diacrylates.I ntroduction of am inor amount of redox-responsive disulfide-functionalized diacrylates ( 10 wt %) induced the formation of flower-like shapes.The shape of the particles can be tuned from flower-todisk-like to spherical by elevating the polymerization temperature.The solvent environment also has ap ronounced effect on the particle size. Time-resolved TEM reveals that the final particle morphology was formed in the early stages of the polymerization and that subsequent polymerization resulted in continued particle growth without affecting the morphology.F inally,t he degradation of the particles under reducing conditions was much faster for flowerlike particles than for spherical particles,likely aresult of their higher surface-to-volume ratio.

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Anisotropic Polymer Nanoparticles with Tunable Emission Wavelengths by Intersegmental Chain Packing

Cited by 8 publications

References 29 publications

Organic Semiconductors Processed from Synthesis‐to‐Device in Water

Organic Semiconductors Processed from Synthesis‐to‐Device in Water

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

Flower‐Like Colloidal Particles through Precipitation Polymerization of Redox‐Responsive Liquid Crystals

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