Addition of single-wall carbon nanotubes to a liquid crystal material: Impact on dielectric properties |
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| Affiliation: | 1. Department of Chemistry, Istanbul Technical University, 34469 Istanbul, Turkey;2. Department of Physics, Yıldız Technical University, 34210 Istanbul, Turkey;3. Yıldız Technical University, Vocational School, Maslak, Istanbul, Turkey;4. Department of Industrial Engineering, Yalova University, 77000 Yalova, Turkey;1. University Department of Physics, Ranchi University, Ranchi 834008, India;2. Department of Electrical Engineering, College of Technology and Engineering, Udaipur 313001, India;3. Institute Instrumentation Centre, Indian Institute of Technology, Roorkee 247667, India;1. Department of Physics, Faculty of Sciences, University of Atatürk, 25240 Erzurum, Turkey;2. Department of Bioengineering, Faculty of Engineering and Architecture, Kafkas University, Turkey;3. Department of Chemistry, Faculty of Sciences, University of Atatürk, 25240 Erzurum, Turkey;4. Physics Engineering Department, Faculty of Science, Istanbul Medeniyet University, Istanbul 34100, Turkey;1. Department of Physics, Sri Ramakrishna Mission Vidyalaya college of Arts and Science, Coimbatore 641020, Tamil Nadu, India;2. Research & Development Centre, Bharathiar University, Coimbatore 641046, Tamil Nadu, India;3. Department of Physics, Dr. Mahalingam College of Engineering and Technology, Pollachi 642003, Tamil Nadu, India;4. Department of Physics, Adhiyamaan College of Engineering, Hosur 635109, Tamil Nadu, India |
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| Abstract: | In this study, the effect of carbon nanotube (CNT) on the dielectric parameters of (11-(4-cyanobiphenyl-4′-oxy)undecan-1-ol) (coded as) LC11 has been investigated by dielectric spectroscopy measurements. According to analysis of ac dielectric parameters׳ analysis, while relaxation frequency increases with CNT doping, the magnitude of energy loss decreases. In this respect, CNT doped LC11 material which can be utilized in the wide working frequency interval with low energy requirements, has a great potential for technological applications. On the other hand, CNT adding changes the relaxation type from nearly Debye to non-Debye type. In addition to these remarkable modifications on the dielectric parameters, it has been determined that CNT doping extends the frequency interval where the liquid crystal (LC) system shows negative dielectric anisotropy (NDA). In other words, observation of the NDA at the higher frequency region relative to LC11 means that the molecular alignment can be controlled by CNT. Hence, tuning the alignment of the LC11 molecules by CNT doping may lead its utility for various LC device applications. |
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| Keywords: | Negative dielectric anisotropy Liquid crystal Carbon Nano-Tube (CNT) Cole–Cole plot Dielectric spectroscopy |
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