Multi-walled carbon nanotubes-ferroelectric liquid crystal nanocomposites: effect of cell thickness and dopant concentration on electro-optic and dielectric behaviour |
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| Authors: | Ravi K Shukla Ashok Chaudhary Alexej Bubnov K K Raina |
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| Institution: | 1. Department of Physics, DIT University, Dehradun, Uttarakhand, India;2. Department of Physics, Swami Premanand Mahavidyalaya Mukerian (Affiliated to Panjab University Chandigarh), Punjab, India;3. Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic |
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| Abstract: | Nanocomposites comprise functionalised multi-walled carbon nanotubes (0.00 wt%, 0.05 wt% and 0.07 wt%) and ferroelectric liquid crystals (FLCs) have been studied in the 5-μm- and 12-μm-thickness cells. Effect of anchoring energy and dopant concentration on the mesomorphic, electro-optic and dielectric behaviour of FLC has been explored. Fast switching time and increase in permittivity of non-doped FLCs and resulting nanocomposites as a function of increased cell thickness (from 5 to 12 μm) can be attributed to the change in the anchoring energy and direct current (DC) conductivity of the non-doped and doped systems. π–π stacking between carbon nanotubes and FLC layers give rise to the spontaneous polarisation of nanocomposites. Effect of cell thickness and anchoring energy on bistability are also discussed. |
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| Keywords: | Nanocomposite ferroelectric liquid crystal self-assembling behaviour multi-walled carbon nanotubes cell thickness electro-optic properties dielectric spectroscopy |
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