Molecular tracer diffusion in thin azobenzene polymer layers
- Translational diffusion of fluorescent tracer molecules in azobenzene polymer layers is studied at different temperatures and under illumination using the method of fluorescence recovery after photobleaching. Diffusion is clearly observed in the dark above the glass transition temperature, while homogeneous illumination at 488 nm and 100 mW/cm(2) does not cause any detectable diffusion of the dye molecules within azobenzene layers. This implies that the viscosity of azobenzene layers remains nearly unchanged under illumination with visible light in the absence of internal or external forces. (c) 2006 American Institute of Physics.
| Author details: | Norman Mechau, Marina SaphiannikovaORCiD, Dieter NeherORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1063/1.2405853 |
| ISSN: | 0003-6951 |
| Title of parent work (English): | Applied physics letters |
| Publisher: | Elsevier |
| Place of publishing: | Melville |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2006/12/18 |
| Publication year: | 2006 |
| Release date: | 2020/04/14 |
| Volume: | 89 |
| Issue: | 25 |
| Number of pages: | 3 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer review: | Referiert |
