Annamalai, Saravanan, Ramasamy, Radha Perumal. (1402). Chitosan - Carbon Nanotube - Maghemite nanocomposites – A Flexible Negative Dielectric Constant Material. هنرهای کاربردی, 3(2), 147-158. doi: 10.22075/ppam.2023.31641.1064
Saravanan Annamalai; Radha Perumal Ramasamy. "Chitosan - Carbon Nanotube - Maghemite nanocomposites – A Flexible Negative Dielectric Constant Material". هنرهای کاربردی, 3, 2, 1402, 147-158. doi: 10.22075/ppam.2023.31641.1064
Annamalai, Saravanan, Ramasamy, Radha Perumal. (1402). 'Chitosan - Carbon Nanotube - Maghemite nanocomposites – A Flexible Negative Dielectric Constant Material', هنرهای کاربردی, 3(2), pp. 147-158. doi: 10.22075/ppam.2023.31641.1064
Annamalai, Saravanan, Ramasamy, Radha Perumal. Chitosan - Carbon Nanotube - Maghemite nanocomposites – A Flexible Negative Dielectric Constant Material. هنرهای کاربردی, 1402; 3(2): 147-158. doi: 10.22075/ppam.2023.31641.1064

Chitosan - Carbon Nanotube - Maghemite nanocomposites – A Flexible Negative Dielectric Constant Material

Progress in Physics of Applied Materials
دوره 3، شماره 2 - شماره پیاپی 5، اسفند 2023، صفحه 147-158    اصل مقاله (693.79 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22075/ppam.2023.31641.1064
نویسندگان
Saravanan Annamalai1؛ Radha Perumal Ramasamy* 2
1Department of Physics, Bharath Institute of Higher Education and Research, Chennai - 600 073
2Department of Physics Anna University, CEG Campus, Chennai - 600 025
چکیده
In this work, the nanocomposites of chitosan containing carbon nanotubes (CNT) and maghemite nanoparticles have been prepared by solution casting method. Techniques such as Raman spectroscopy, SEM, TEM, dielectric relaxation spectroscopy, and VSM studies were made.  The incorporation of CNT in to the chitosan matrix and also the interaction between the CNT and the maghemite nanoparticles were studied using Raman spectroscopy. The dielectric constant of Chitosan-CNT composites turned from positive to negative at low frequency when CNT concentration increased from 10 to 20wt%. Interestingly, addition of 20wt% of maghemite nanoparticles into the Cs-CNT nanocomposites affected both the dielectric property and the conductivity of the composite. VSM measurement shows that the prepared maghemite nanoparticles and the Cs-CNT-maghemite nanocomposites are superparamagnetic materials. Observed dielectric characteristics and the electrical conductivity of the samples have been explained by using a model. Tuning of negative permittivity in the chitosan-CNT nanocomposites by using maghemite nanoparticles could be useful as metamaterials.
کلیدواژه‌ها
negative dielectric constant materials؛ chitosan؛ carbon nano tubes and maghemite
مراجع
آمار
تعداد مشاهده مقاله: 385
تعداد دریافت فایل اصل مقاله: 452
دانشگاه سمنان
پیوندهای مفید
آمار
تعداد نشریات22
تعداد شماره‌ها723
تعداد مقالات10,394
تعداد مشاهده مقاله72,849,079
تعداد دریافت فایل اصل مقاله64,547,739