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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Araghi, Hessamaddin Younesi Giri, Neeraj K. Paige, Matthew F. |
| Description | Country affiliation: Canada Author Affiliation: Araghi HY ( Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.); Giri NK ( Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.); Paige MF ( Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada. Electronic address: matthew.paige@usask.ca.) |
| Abstract | Photoillumination of mixed films comprised of the photopolymerizable fatty acid 10,12 pentacosadiynoic acid and perfluorotetradecanoic acid deposited onto glass substrates gives rise to the formation of oriented polydiacetylene photopolymer fibers. The degree of polymer fiber orientation was investigated using dual-view, polarized fluorescence microscopy of the polydiacetylene, which allowed for characterization of individual fluorescent polymer fibers after photopolymerization, as well as comparison of the orientation of different fibers within the same sample. Measurements indicated that individual fibers consisted of multiple photopolymer strands with various orientations, and that there was a preferred orientation for fibers in the film as a whole. The fibers were preferentially oriented at an angle of approximately 60° to the direction of film compression during deposition from a Langmuir trough, with orientation being the result of mechanical stress exerted by the compression barriers coupled with rotation of the polymer fibers during film draining. These measurements were complemented with conventional 'bulk' fluorescence polarization experiments, and compared with mixed film structures described previously for these systems at the air-water interface using Brewster angle microscopy. |
| ISSN | 13861425 |
| Volume Number | 129 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-08-14 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fatty Acids, Unsaturated Chemistry Fluorocarbons Myristic Acids Polymerization Microscopy, Fluorescence Microscopy, Polarization Polyacetylenes Polyesters Polymers Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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