Electric-Field-Induced Dispersion of Multiwalled Carbon Nanotubes in Nematic Liquid Crystal

2011 ◽  
Vol 115 (44) ◽  
pp. 21652-21658 ◽  
Author(s):  
Weiwei Tie ◽  
Gyu Hyung Yang ◽  
Surjya Sarathi Bhattacharyya ◽  
Young Hee Lee ◽  
Seung Hee Lee
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Electric Field ◽  
Multiwalled Carbon Nanotubes ◽  
Nematic Liquid Crystal ◽  
Multiwalled Carbon

DYNAMIC RESPONSE OF CARBON NANOTUBES DISPERSED IN NEMATIC LIQUID CRYSTAL

NANO ◽  
2007 ◽  
Vol 02 (01) ◽  
pp. 41-49 ◽  
Author(s):  
SANG YOUN JEON ◽  
KYUNG AH PARK ◽  
IN-SU BAIK ◽  
SEOK JIN JEONG ◽  
SEOK HO JEONG ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Electric Field ◽  
Dynamic Response ◽  
Nematic Liquid Crystal ◽  
Density Functional ◽  
Strong Electric Field ◽  
Optical Microscope ◽  
Analysis Of Dynamics ◽  
Vertical Cell

The alignment and dynamic response of carbon nanotubes (CNTs) in nematic liquid crystal (NLC) medium induced by strong electric field have been observed through polarizing optical microscope. Density-functional calculations suggest that LC molecule anchors helically to the CNT wall to enhance π-stacking with a binding energy of nearly -2.0 eV due to a considerable amount of charge transfer from LC molecule to CNT, resulting in the formation of excess charges and permanent dipole moment in CNTs. Under strong electric field, the motion of CNTs distorted the director of adjacent LC molecules. Our detailed analysis of dynamics revealed that the four-lobe textures in vertical cell and two vertical stripes in in-plane switching cell were strongly correlated, i.e., the side view of textures by the vertical motion of CNTs in vertical cell was similar to the textures in in-plane switching cell. Interestingly, the magnitude of textures in microscope was strongly dependent on the size of CNTs and the applied field strength. The statistical size distribution of textures similar to that of CNTs provided information for the degree of dispersion of CNTs.

Alignment of multiwalled carbon nanotubes in bulk epoxy composites via electric field

2009 ◽  
Vol 105 (5) ◽  
pp. 054319 ◽  
Author(s):  
Yue-Feng Zhu ◽  
Chen Ma ◽  
Wei Zhang ◽  
Ren-Ping Zhang ◽  
Nikhil Koratkar ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Multiwalled Carbon Nanotubes ◽  
Epoxy Composites ◽  
Multiwalled Carbon

Electric-Field-Induced Formation of Multiwalled Carbon Nanotube Conductive Pathways in Positive Dielectric Anisotropic Nematic Liquid Crystal Host

2011 ◽  
Vol 50 (12R) ◽  
pp. 121701 ◽  
Author(s):  
Prasenjit Nayek ◽  
Sharmistha Ghosh ◽  
Santanu Karan ◽  
Shin-Woong Kang ◽  
Subir Kumar Roy ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Carbon Nanotube ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

Phase transitions in smectogenic liquid crystal 4-butoxybenzylidene-4′-butylaniline (BBBA) doped by multiwalled carbon nanotubes

2013 ◽  
Vol 86 (5) ◽  
pp. 463-476 ◽  
Author(s):  
N.I. Lebovka ◽  
L.N. Lisetski ◽  
A.I. Goncharuk ◽  
S.S. Minenko ◽  
V.V. Ponevchinsky ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon
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