Kraska, M. ; Gallei, M. ; Stühn, B. ; Rehahn, M. (2013)
Pressure Induced Structure Formation in Langmuir Monolayers of Amphiphilic Metallocene Diblock Copolymers.
In: LANGMUIR, 26
doi: 10.1021/la4007636
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present in situ structural investigations of a metal-containing diblock copolymer on a water surface. Mono layers of poly(vinylferrocene-b-(2-vinylpyridine)) (PVFc-b-P2VP) block copolymers are studied in a wide range of compositions by varying molar masses of P2VP with two different molecular weights of PVFc. We focus on the role of the respective block partners, PVFc and P2VP, when compressing the layer on the water surface. Compression isotherms are presented and interpreted in terms of the classical gaseous, expanded, and condensed phases. We calculate isothermal compressibilities, which reveal a minimum value independent of the molar masses of the respective block partners. We find the isotherms to be dominated by P2VP while PVFc barely contribute to the compression behavior due to its rather compact coil structure. We consider the diblock copolymer monolayers as a two-dimensional model system, which is reflected by two-dimensional scaling behavior in the semi dilute and condensed regime. By X-ray reflectometry (XR), we monitor in situ the monolayer structure change with increasing surface pressure Pi and observe the PVFc-b-P2VP separation at high Pi.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Kraska, M. ; Gallei, M. ; Stühn, B. ; Rehahn, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Pressure Induced Structure Formation in Langmuir Monolayers of Amphiphilic Metallocene Diblock Copolymers |
| Sprache: | Englisch |
| Publikationsjahr: | 2 Juli 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | LANGMUIR |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| DOI: | 10.1021/la4007636 |
| Kurzbeschreibung (Abstract): | We present in situ structural investigations of a metal-containing diblock copolymer on a water surface. Mono layers of poly(vinylferrocene-b-(2-vinylpyridine)) (PVFc-b-P2VP) block copolymers are studied in a wide range of compositions by varying molar masses of P2VP with two different molecular weights of PVFc. We focus on the role of the respective block partners, PVFc and P2VP, when compressing the layer on the water surface. Compression isotherms are presented and interpreted in terms of the classical gaseous, expanded, and condensed phases. We calculate isothermal compressibilities, which reveal a minimum value independent of the molar masses of the respective block partners. We find the isotherms to be dominated by P2VP while PVFc barely contribute to the compression behavior due to its rather compact coil structure. We consider the diblock copolymer monolayers as a two-dimensional model system, which is reflected by two-dimensional scaling behavior in the semi dilute and condensed regime. By X-ray reflectometry (XR), we monitor in situ the monolayer structure change with increasing surface pressure Pi and observe the PVFc-b-P2VP separation at high Pi. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) > Experimentelle Physik kondensierter Materie 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) 05 Fachbereich Physik |
| Hinterlegungsdatum: | 02 Sep 2013 06:52 |
| Letzte Änderung: | 02 Sep 2013 06:52 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum