Schimka, Selina ; Gordievskaya, Yulia D. ; Lomadze, Nino ; Lehmann, Maren ; Klitzing, Regine von ; Rumyantsev, Artem M. ; Kramarenko, Elena Yu. ; Santer, Svetlana (2022)
Communication: Light driven remote control of microgels’ size in the presence of photosensitive surfactant: Complete phase diagram.
In: The Journal of Chemical Physics, 2017, 147 (3)
doi: 10.26083/tuprints-00022936
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Here we report on a light triggered remote control of microgel size in the presence of photosensitive surfactant. The hydrophobic tail of the cationic surfactant contains azobenzene group that undergoes a reversible photo-isomerization reaction from a trans- to a cis-state accompanied by a change in the hydrophobicity of the surfactant. We have investigated light assisted behaviour and the complex formation of the microgels with azobenzene containing surfactant over the broad concentrational range starting far below and exceeding several times of the critical micelle concentration (CMC). At small surfactant concentration in solution (far below CMC), the surfactant in the trans-state accommodates within the microgel causing its compaction, while the cis-isomer desorbs out of microgel resulting in its swelling. The process of the microgel size change can be described as swelling on UV irradiation (trans-cis isomerization) and shrinking on irradiation with blue light (cis-trans isomerization). However, at the surfactant concentrations larger than CMC, the opposite behaviour is observed: the microgel swells on blue irradiation and shrinks during exposure to UV light. We explain this behaviour theoretically taking into account isomer dependent micellization of surfactant within the microgels.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Schimka, Selina ; Gordievskaya, Yulia D. ; Lomadze, Nino ; Lehmann, Maren ; Klitzing, Regine von ; Rumyantsev, Artem M. ; Kramarenko, Elena Yu. ; Santer, Svetlana |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Communication: Light driven remote control of microgels’ size in the presence of photosensitive surfactant: Complete phase diagram |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2017 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | The Journal of Chemical Physics |
| Jahrgang/Volume einer Zeitschrift: | 147 |
| (Heft-)Nummer: | 3 |
| Kollation: | 5 Seiten |
| DOI: | 10.26083/tuprints-00022936 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/22936 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | Here we report on a light triggered remote control of microgel size in the presence of photosensitive surfactant. The hydrophobic tail of the cationic surfactant contains azobenzene group that undergoes a reversible photo-isomerization reaction from a trans- to a cis-state accompanied by a change in the hydrophobicity of the surfactant. We have investigated light assisted behaviour and the complex formation of the microgels with azobenzene containing surfactant over the broad concentrational range starting far below and exceeding several times of the critical micelle concentration (CMC). At small surfactant concentration in solution (far below CMC), the surfactant in the trans-state accommodates within the microgel causing its compaction, while the cis-isomer desorbs out of microgel resulting in its swelling. The process of the microgel size change can be described as swelling on UV irradiation (trans-cis isomerization) and shrinking on irradiation with blue light (cis-trans isomerization). However, at the surfactant concentrations larger than CMC, the opposite behaviour is observed: the microgel swells on blue irradiation and shrinks during exposure to UV light. We explain this behaviour theoretically taking into account isomer dependent micellization of surfactant within the microgels. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-229362 |
| Zusätzliche Informationen: | Supplementary material: Video of the reversibly swelling microgel: https://t1p.de/enm4l |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | Profilbereiche Profilbereiche > Thermo-Fluids & Interfaces 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) |
| Hinterlegungsdatum: | 28 Nov 2022 13:58 |
| Letzte Änderung: | 29 Nov 2022 06:51 |
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- Communication: Light driven remote control of microgels’ size in the presence of photosensitive surfactant: Complete phase diagram. (deposited 28 Nov 2022 13:58) [Gegenwärtig angezeigt]
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