TY - JOUR
T1 - Addition of single-wall carbon nanotubes to a liquid crystal material
T2 - Impact on dielectric properties
AU - Gursel, Y.
AU - Şenkal, B. F.
AU - Yilmaz Canli, N.
AU - Güven Özdemir, Z.
AU - Ahlatcioʇlu, E.
AU - Yilmaz,
AU - Okutan, M.
N1 - Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2015/6/1
Y1 - 2015/6/1
N2 - 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.
AB - 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.
KW - Carbon Nano-Tube (CNT)
KW - Cole-Cole plot
KW - Dielectric spectroscopy
KW - Liquid crystal
KW - Negative dielectric anisotropy
UR - http://www.scopus.com/inward/record.url?scp=84929324544&partnerID=8YFLogxK
U2 - 10.1016/j.mssp.2015.02.031
DO - 10.1016/j.mssp.2015.02.031
M3 - Article
AN - SCOPUS:84929324544
SN - 1369-8001
VL - 34
SP - 182
EP - 188
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
ER -