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doi:10.22028/D291-34098
Titel: | Progress Report on pH-Influenced Photocatalysis for Active Motion |
VerfasserIn: | Heckel, Sandra Hübner, Julia Leutzgen, Anne Jung, Gregor Simmchen, Juliane |
Sprache: | Englisch |
Titel: | Catalysts |
Bandnummer: | 11 |
Heft: | 5 |
Verlag/Plattform: | MDPI |
Erscheinungsjahr: | 2021 |
Freie Schlagwörter: | microswimmer smart pH-sensitive photoacid |
DDC-Sachgruppe: | 540 Chemie |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Living systems use catalysis to achieve chemical transformations to comply with their needs in terms of energy and building blocks. The pH is a powerful means to regulate such processes, which also influences synthetic systems. In fact, the pH sensitivity of artificial photocatalysts, such as bismuth vanadate, bears the strong potential of flexibly influencing both the motion pattern and the speed of catalytic microswimmers, but it has rarely been investigated to date. In this work, we first present a comprehensive view of the motion behavior of differently shaped bismuth vanadate microswimmers, discuss influences, such as shape, pH, and conductivity of the solutions, and find that the motion pattern of the swimmers switches between upright and horizontal at their point of zero charge. We then apply an immobilizable hydroxypyrene derivative to our substrates to locally influence the pH of the solution by excited-state proton transfer. We find that the motion pattern of our swimmers is strongly influenced by this functionalization and a third motion mode, called tumbling, is introduced. Taking other effects, such as an increased surface roughness of the modified substrates, into account, we critically discuss possible future developments. |
DOI der Erstveröffentlichung: | 10.3390/catal11050599 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-340986 hdl:20.500.11880/31355 http://dx.doi.org/10.22028/D291-34098 |
ISSN: | 2073-4344 |
Datum des Eintrags: | 25-Mai-2021 |
Bezeichnung des in Beziehung stehenden Objekts: | Supplementary Materials |
In Beziehung stehendes Objekt: | https://www.mdpi.com/article/10.3390/catal11050599/s1 |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Chemie |
Professur: | NT - Prof. Dr. Gregor Jung |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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catalysts-11-00599-v2.pdf | 651,59 kB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons