Experimental studies on the rheology of cubic blue phases
| Autor: | Olga Chojnowska, Roman Dabrowski, Surajit Dhara, Rasmita Sahoo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Nanotechnology 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Light scattering 010305 fluids & plasmas Rheology Shear (geology) Chemical physics 0103 physical sciences Stress relaxation 0210 nano-technology Elastic modulus |
| Zdroj: | Soft Matter. 12:1324-1329 |
| ISSN: | 1744-6848 1744-683X |
| DOI: | 10.1039/c5sm02299a |
| Popis: | We report detailed experimental studies on the rheology of cubic blue phases. We observe several flow regimes within each blue phase from rheomicroscopy and small angle light scattering experiments. Both the cubic blue phases exhibit solid-like response while the cholesteric phase shows gel-like behavior. The elastic modulus of BP-I is larger than that of BP-II. The shear induced yield transition occurs at a higher strain in BP-II than BP-I. Both the blue phases show stress relaxation through periodic modulation in step-strain experiments. Our results show that the rheological responses of these two phases are significantly different owing to the distinct networks of defect-disclinations. |
| Databáze: | OpenAIRE |
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