Self-assembly of diblock molecular polymer brushes in the spherical confinement of nanoemulsion droplets

Understanding the self-assembly behavior of polymers of various topologies is key to a reliable design of functional polymer materials. Self-assembly under confinement conditions emerges as a versatile avenue to design polymer particles with complex internal morphologies while simultaneously facilitating scale-up. However, only linear block copolymers have been studied to date, despite the increasing control over macromolecule composition and architecture available. This study extends the investigation of polymer self-assembly in confinement from regular diblock copolymers to diblock molecular polymer brushes (MPBs). Block-type MPBs with polystyrene (PS) and polylactide (PLA) compartments of different sizes are incorporated into surfactant-stabilised oil-in-water (chloroform/water) emulsions. The increasing confinement in the nanoemulsion droplets during solvent evaporation directs the MPBs to form solid nano/microparticles. Microscopy studies reveal an intricate internal particle structure, including interpenetrating networks and axially-stacked lamellae of PS and PLA, depending on the PS/PLA ratio of the brushes.Australian Research Council. Grant Number: DE180100007 endowed professorship. Grant Number: 2016‐2022 German Research Foundation (DFG). Grant Numbers: 2017‐2022, 37692067

Confinement Assembly of ABC Triblock Terpolymers for the High-Yield Synthesis of Janus Nanorings

Block copolymers are versatile building blocks for the self-assembly of functional nanostructures in bulk and solution. While spheres, cylinders, and bilayer sheets are thermodynamically preferred shapes and frequently observed, ring-shaped nanoparticles are more challenging to realize due to energetic penalties that originate from their anisotropic curvature. Today, a handful of concepts exist that produce core-shell nanorings, while more complex (e.g. patchy) nanorings are currently out of reach and have only been predicted theoretically. Here, we demonstrate that confinement assembly of properly designed ABC triblock terpolymers is a general route to synthesize Janus nanorings in high purity. The triblock terpolymer self-assembles in the spherical confinement of nanoemulsion droplets into prolate ellipsoidal microparticles with an axially-stacked lamellar-ring (lr)-morphology. We clarified and visualized this complex, yet well-ordered, morphology with transmission electron tomography (ET). Blocks A and C formed stacks of lamellae with the B microdomain sandwiched in-between as nanorings. Cross-linking of the B-rings allows disassembly of the microparticles into Janus nanorings (JNRs) carrying two strictly separated polymer brushes of A and C on top and bottom. Decreasing the B volume leads to Janus spheres and rods, while an increase of B results in perforated and filled Janus disks. The confinement assembly of ABC triblock terpolymers is a general process that can be extended to other block chemistries and will allow to synthesize a large variety of complex micro- and nanoparticles that inspire studies in self-assembly, interfacial stabilization, colloidal packing, and nanomedicine

Joint declaration on mainstreaming RRI across Horizon Europe

Leading RRI researchers and practitioners, together with policymakers and stakeholder organisations, discussed the state-of-the-art and future perspectives for RRI at the ‘Pathways to Transformation’ conference in June 2019, an event which was extended beyond Brussels, for instance by ca. 330 original tweets and ca. 840 retweets from ca. 160 unique accounts. In the conference, many participants expressed their concern about an uncertain future for RRI in the EC. As a result, numerous large-scale EU-funded RRI projects signed a Joint Declaration, urging the European Commission to make RRI a key objective of the upcoming framework programme, Horizon Europe – a plea to both mainstream the approach across the programme and provide specific resources for strengthening the RRI knowledge base. As the Horizon Europe programme is being forged, it is timely to present the Declaration for a broader audience

Juventude em situação de vulnerabilidade social na cidade de Santo Ângelo, relações e concepções dos jovens acerca do meio urbano

Este trabalho foi elaborado a partir do projeto de pesquisa “Juventude em situação de vulnerabilidade social na cidade de Santo Ângelo, relações e concepções dos jovens acerca do meio urbano” que teve por objetivo proporcionar, através de grupo com os jovens, um espaço para discussão a respeito do meio urbano e acesso à cidade; Dar visibilidade aos jovens santoangelenses que vivem em situação de vulnerabilidade social; Conhecer as expectativas e projeções de futuro dos mesmos e incentivar a participação política nos meios em que estavam inseridos. O grupo ocorreu numa escola de ensino fundamental e a pesquisa seguiu na linha teórica da esquizoanálise valendo-se da cartografia como método. Considerando que o tema mais presente nas discussões foi a violência em diferentes contextos, destacamos a importância de ações que articulem poder público, instituições de ensino e sociedade civil, visando a redução das desigualdades sociais, já que esse é um fator diretamente relacionado ao fenômeno da violência e a outros fatores negativos

Joint declaration on mainstreaming RRI across HorizonEurope

Leading RRI researchers and practitioners, together with policymakers and stakeholder organisations, discussed the stateof-the-art and future perspectives for RRI at the ‘Pathways to Transformation’ conference in June 2019, an event which was extended beyond Brussels, for instance by ca. 330 original tweets and ca. 840 retweets from ca. 160 unique accounts. In the conference, many participants expressed their concern about an uncertain future for RRI in the EC. As a result, numerous largescale EU-funded RRI projects signed a Joint Declaration1, urging the European Commission to make RRI a key objective of the upcoming framework programme, Horizon Europe – a plea to both mainstream the approach across the programme and provide specific resources for strengthening the RRI knowledge base. As the Horizon Europe programme is being forged, it is timely to present the Declaration for a broader audience