Comparative study of carbon nanotubes- and fullerenes-doped liquid crystal for different electrophoretic parameters

This research focuses on the study of different electrokinetic parameters of carbon nanotubes (CNTs) and fullerene aggregates in liquid crystal (LC) host medium, which are investigated in the homogeneously aligned nematic LC cells driven by in-plane field. The colloidal CNTs in LC medium are observe...

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Bibliographic Details
Published in:Journal of materials science 2014-02, Vol.49 (4), p.1695-1700
Main Authors: Srivastava, Anoop Kumar, Pandey, Avinash C., Kripal, Ram, Lee, Seung Hee
Format: Article
Language:English
Subjects:
Carbon nanotubes
Characterization and Evaluation of Materials
Charge
Chemistry and Materials Science
Classical Mechanics
Colloids
Comparative analysis
Comparative studies
Crystallography and Scattering Methods
Crystals
Dielectrophoresis
Electric fields
Electric properties
Electrodes
Electrokinetics
Electrophoresis
Fullerenes
High frequencies
Liquid crystals
Materials Science
Mathematical models
Nanostructure
Nanotubes
Parameters
Polymer Sciences
Solid Mechanics
Zeta potential
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Summary:This research focuses on the study of different electrokinetic parameters of carbon nanotubes (CNTs) and fullerene aggregates in liquid crystal (LC) host medium, which are investigated in the homogeneously aligned nematic LC cells driven by in-plane field. The colloidal CNTs in LC medium are observed to move towards the negative electrodes whereas the fullerenes in LC medium are observed to move towards positive electrode at low frequencies. We propose a model to estimate the charge and zeta potential of colloidal particles by incorporating both the dielectrophoresis and electrophoresis forces in order to probe the reason of moving the colloidal particles in opposite direction. Interestingly, charge and zeta potential values on CNTs and fullerenes estimated from given model were positive and negative, respectively. The CNTs and fullerenes at high frequency and field are found to stretch along the direction of electric field. The CNTs dispersed whereas fullerenes start to move in perpendicular direction to the applied electric field with increasing electric field at high frequency.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-013-7854-z