Abstract
The effects of multiwall carbon nanotube on dielectric ansitropy and molecular reorientation properties of 4-hepty1-4'-cyanobiphenyl liquid crystal have been investigated. The 4-hepty1-4'-cyanobiphenyl liquid crystal exhibits the negative resitance effect at higher voltages (3.5 V), whereas rnultiwall carbon nanotube doped 4-hepty1-4'-cyanobiphenyl liquid crysatl shifts it to the lower voltages (0.3 V). The 4- hepty1-4'-cyanobiphenyl and multiwall carbon nanotube doped 4-hepty1-4'cyanobiphenyl liquid crystals indicate a p-type dielectric anisotropy behaviour. The multiwall carbon nanotube dopant increases the dielectric anisotropy Delta epsilon of 4-hepty1-4'-cyanobiphenyl as the dopant-used facilitates the reorientation of the molecules in liquid crystal. It is has shown that the negative resitance effect and molecular reorientation properties of the 4-hepty1-4'-cyanobiphenyl are changed with multiwall carbon nanotube dopant.
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