Study viscoelasticity of ultrathin poly(oligo(ethylene glycol) methacrylate) brushes by a quartz crystal microbalance with dissipation
Ultrathin polymer brushes play important roles in natural and artificial systems. To better understand and utilize their unique behaviors, characterization is a fundamental, but not trivial, task. In this paper, we demonstrated that the quartz crystal microbalance with dissipation (QCM-D) could be a...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1992. - 24(2008), 12 vom: 17. Juni, Seite 6100-6 |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2008
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Methacrylates Polymers Sulfhydryl Compounds Water 059QF0KO0R Quartz 14808-60-7 ethylene dimethacrylate |
| Zusammenfassung: | Ultrathin polymer brushes play important roles in natural and artificial systems. To better understand and utilize their unique behaviors, characterization is a fundamental, but not trivial, task. In this paper, we demonstrated that the quartz crystal microbalance with dissipation (QCM-D) could be applied to study ultrathin poly(oligo(ethylene glycol) methacrylate) brushes. First, we identified four linear relations between dissipation/frequency changes and thickness changes, which were measured by QCM-D and ellipsometry, respectively. Next, we derived a set of equations starting from the Voigt model to further extract viscoelasticity of poly(OEGMA) brushes (<or=30 nm) under high-frequency vibration in contact with water. The viscosity was approximately 10(-3) N s m(-2) and the elasticity was approximately 10(5) N m(-2). Both were frequency dependent. Also discussed were other quantities such as the density (both the dry and wet film) and the working range of linear relations. These equations and quantitative information are important in advancing our understanding of ultrathin polymer brushes, which consequently promote our ability in designing functional surface coatings (i.e., in biosensor applications) and studying related interfacial phenomena |
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| Beschreibung: | Date Completed 04.08.2008 Date Revised 21.11.2013 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/la703661z |