Preparation of Reinforced Anisometric Patchy Supraparticles for Self‐Propulsion

dc.contributor.authorOguztürk, H. Esra
dc.contributor.authorBauer, Leona J.
dc.contributor.authorMantouvalou, Ioanna
dc.contributor.authorKanngieβ  er, Birgit
dc.contributor.authorVelev, Orlin D.
dc.contributor.authorGradzielski, Michael
dc.date.accessioned2021-06-24T14:18:17Z
dc.date.available2021-06-24T14:18:17Z
dc.date.issued2021-05-05
dc.date.updated2021-06-01T12:31:54Z
dc.description.abstractThe preparation of fumed silica‐based anisometric supraparticles with well‐defined catalytically active patches suitable for self‐propulsion is presented here. These sub‐millimeter‐sized particles can self‐propel as they contain Pt‐covered magnetite (Fe3O4) nanoparticles, where the Pt can decompose catalytically a “fuel” like H2O2 and thereby propel the supraparticles. By their magnetic properties, the catalytically active nanoparticles can be concentrated in patches on the supraparticle surface. The goal is to obtain robust supraparticles with well‐defined patchiness and long‐time stability during self‐propulsion through evaporation‐induced self‐assembly (EISA) on a superhydrophobic surface. The latter is a major issue as oxygen evolution can lead to the disintegration of the supraparticles. Therefore, enhanced mechanical stability is sought using a number of different additives, where the best results are obtained by incorporating polystyrene microspheres followed by heat treatment or reinforcement with microfibrillated cellulose (MFC) and sodium trisilicate (Na2SiO3). The detailed internal structure of the different types of particles is investigated by confocal micro‐X‐ray fluorescence spectroscopy (CMXRF), which allows for precisely locating the catalytic Fe3O4@Pt nanoparticles within the supraparticles with a resolution in the µm range. The insights on the supraparticle structure, together with their long‐time stability, allow fabricating optimized patchy supraparticles for potential applications in propulsion‐enhanced catalysis.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2021
dc.identifier.eissn1521-4117
dc.identifier.issn0934-0866
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13283
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12075
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otheranisometricen
dc.subject.otherfumed silicaen
dc.subject.othermagnetiteen
dc.subject.othermicrofibrillated celluloseen
dc.subject.otherplatinum catalysten
dc.subject.othersuperhydrophobicen
dc.titlePreparation of Reinforced Anisometric Patchy Supraparticles for Self‐Propulsionen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber2000328en
dcterms.bibliographicCitation.doi10.1002/ppsc.202000328en
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleParticle & Particle Systems Characterizationen
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.volume38en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Physikalische Chemie / Molekulare Materialwissenschaftende
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Physikalische Chemie / Molekulare Materialwissenschaftende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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