Contact studies of weakly compressed PEG brushes with a quartz crystal resonator
A quartz crystal resonator was used to characterize the contact of an elastomeric polymer membrane with a grafted poly(ethylene glycol) (PEG) brush in an aqueous environment. A two-layer model of the acoustic impedance of the system was used to measure the brush thickness before and after contact wi...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1999. - 22(2006), 22 vom: 24. Okt., Seite 9225-33 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2006
|
| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Quartz 14808-60-7 Polyethylene Glycols 3WJQ0SDW1A |
| Zusammenfassung: | A quartz crystal resonator was used to characterize the contact of an elastomeric polymer membrane with a grafted poly(ethylene glycol) (PEG) brush in an aqueous environment. A two-layer model of the acoustic impedance of the system was used to measure the brush thickness before and after contact with the membrane. This model was further extended to include multiple layers, allowing characterization of other monomeric density profiles along the brush thickness. The polymer brush maintains a hydrated layer between the membrane and the quartz crystal surface, the thickness of which could be determined to within 1 nm. We show that the technique is very well suited for studying the properties of highly hydrated layers with thicknesses between 0 and 100 nm at low contact pressures corresponding to a very weak compression of the PEG brush |
|---|---|
| Beschreibung: | Date Completed 19.09.2007 Date Revised 01.12.2018 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |