Conference proceeding
Modification in diffusion kinetics and electro-optic behavior of holographic thin films with carbon nanotubes
PHOTONICS NORTH 2010, v 7750, pp 77501G-77501G-7
01 Jan 2010
Abstract
This work focuses on the study of the modification in formation and electro-optic behavior of holographically formed polymer -liquid crystal thin film gratings doped with multiwalled carbon nanotubes. Results indicate a time delay in the evolution of the first diffraction order in the presence of carbon nanotubes when compared to ones with no nanotubes. An analysis is presented based on the modification of the diffusion kinetics in terms of photo induced phase separation. This slow down is attributed to the non-participation of the carbon nanotubes in the phase separation process, and acting as physical barriers to the counter diffusing liquid crystals. The diffusion constant of nanotubes, incorporating its shape anisotropy, is computed in such a photo polymerizable system and compared with those of the participating polymers and liquid crystals. An optimal concentration of carbon nanotube doping is arrived at which helps in improve the switching speed while maintaining diffraction efficiency. Improvement is switching speed is attributed to reduction in size of the liquid crystal droplets. Scanning electron microscopy results indicate a change in morphology of the gratings doped with carbon nanotubes. In specific, smaller droplet size and, beyond the optimal level of nanotube doping, imperfect liquid crystal phase separation with scarcity of liquid crystal droplets across the sample is seen.
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Details
- Title
- Modification in diffusion kinetics and electro-optic behavior of holographic thin films with carbon nanotubes
- Creators
- Sameet K. Shriyan - Drexel UniversityC. William Hicks - Drexel UniversityAdam K. Fontecchio - Drexel University
- Contributors
- H P Schriemer (Editor)R N Kleiman (Editor)
- Publication Details
- PHOTONICS NORTH 2010, v 7750, pp 77501G-77501G-7
- Series
- Proceedings of SPIE-The International Society for Optical Engineering
- Publisher
- Spie-Int Soc Optical Engineering
- Number of pages
- 7
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000287707900051
- Scopus ID
- 2-s2.0-78049478415
- Other Identifier
- 991020532099904721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Biophysics
- Materials Science, Multidisciplinary
- Optics
- Radiology, Nuclear Medicine & Medical Imaging