Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes
The inclusion of nanoparticles modifies a number of fundamental properties of many materials. Doping of nanoparticles in self-organized materials such as liquid crystals may be of interest for the reciprocal interaction between the matrix and the nanoparticles. Elongated nanoparticles and nanotubes...
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doaj-42e962c1754c4b3e92940559de30ba0a2020-11-24T23:52:58ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862015-02-016139640310.3762/bjnano.6.392190-4286-6-39Electrical response of liquid crystal cells doped with multi-walled carbon nanotubesAmanda García-García0Ricardo Vergaz1José F. Algorri2Xabier Quintana3José M. Otón4CEMDATIC, E.T.S.I. Telecomunicación, Universidad Politécnica de Madrid, Avda. Complutense 30, Madrid, E28040, SpainGDAF-UC3M, Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Butarque 15, Leganés, E28911, SpainGDAF-UC3M, Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Butarque 15, Leganés, E28911, SpainCEMDATIC, E.T.S.I. Telecomunicación, Universidad Politécnica de Madrid, Avda. Complutense 30, Madrid, E28040, SpainCEMDATIC, E.T.S.I. Telecomunicación, Universidad Politécnica de Madrid, Avda. Complutense 30, Madrid, E28040, SpainThe inclusion of nanoparticles modifies a number of fundamental properties of many materials. Doping of nanoparticles in self-organized materials such as liquid crystals may be of interest for the reciprocal interaction between the matrix and the nanoparticles. Elongated nanoparticles and nanotubes can be aligned and reoriented by the liquid crystal, inducing noticeable changes in their optical and electrical properties. In this work, cells of liquid crystal doped with high aspect ratio multi-walled carbon nanotubes have been prepared, and their characteristic impedance has been studied at different frequencies and excitation voltages. The results demonstrate alterations in the anisotropic conductivity of the samples with the applied electric field, which can be followed by monitoring the impedance evolution with the excitation voltage. Results are consistent with a possible electric contact between the coated substrates of the LC cell caused by the reorientation of the nanotubes. The reversibility of the doped system upon removal of the electric field is quite low.https://doi.org/10.3762/bjnano.6.39carbon nanotubesCole–Cole diagramsimpedanceliquid crystalPEDOT:PSS |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Amanda García-García Ricardo Vergaz José F. Algorri Xabier Quintana José M. Otón |
spellingShingle |
Amanda García-García Ricardo Vergaz José F. Algorri Xabier Quintana José M. Otón Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes Beilstein Journal of Nanotechnology carbon nanotubes Cole–Cole diagrams impedance liquid crystal PEDOT:PSS |
author_facet |
Amanda García-García Ricardo Vergaz José F. Algorri Xabier Quintana José M. Otón |
author_sort |
Amanda García-García |
title |
Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
title_short |
Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
title_full |
Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
title_fullStr |
Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
title_full_unstemmed |
Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
title_sort |
electrical response of liquid crystal cells doped with multi-walled carbon nanotubes |
publisher |
Beilstein-Institut |
series |
Beilstein Journal of Nanotechnology |
issn |
2190-4286 |
publishDate |
2015-02-01 |
description |
The inclusion of nanoparticles modifies a number of fundamental properties of many materials. Doping of nanoparticles in self-organized materials such as liquid crystals may be of interest for the reciprocal interaction between the matrix and the nanoparticles. Elongated nanoparticles and nanotubes can be aligned and reoriented by the liquid crystal, inducing noticeable changes in their optical and electrical properties. In this work, cells of liquid crystal doped with high aspect ratio multi-walled carbon nanotubes have been prepared, and their characteristic impedance has been studied at different frequencies and excitation voltages. The results demonstrate alterations in the anisotropic conductivity of the samples with the applied electric field, which can be followed by monitoring the impedance evolution with the excitation voltage. Results are consistent with a possible electric contact between the coated substrates of the LC cell caused by the reorientation of the nanotubes. The reversibility of the doped system upon removal of the electric field is quite low. |
topic |
carbon nanotubes Cole–Cole diagrams impedance liquid crystal PEDOT:PSS |
url |
https://doi.org/10.3762/bjnano.6.39 |
work_keys_str_mv |
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