Cover Image

Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations

The vibrational property of 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6) discotic liquid crystal (DLC) material is investigated in this research by using temperature-dependent Raman spectroscopy technique. One-dimensional (1D) charge transport mechanism in the DLC molecules is enabled in the c...

Full description

Saved in:
Bibliographic Details
Main Authors: Sahamir, Shahrir Razey, Said, Suhana Mohd, Sabri, Mohd Faizul Mohd, Mahmood, Mohamand Syafie, Kamarudin, Muhammad Akmal, Moutanabbir, Oussama
Format: Article
Published: Taylor & Francis 2018
Subjects:
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.um.edu.my/20821/
https://doi.org/10.1080/02678292.2017.1359693
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.eprints.20821
record_format eprints
spelling my.um.eprints.208212019-04-08T03:37:35Z http://eprints.um.edu.my/20821/ Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations Sahamir, Shahrir Razey Said, Suhana Mohd Sabri, Mohd Faizul Mohd Mahmood, Mohamand Syafie Kamarudin, Muhammad Akmal Moutanabbir, Oussama TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering The vibrational property of 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6) discotic liquid crystal (DLC) material is investigated in this research by using temperature-dependent Raman spectroscopy technique. One-dimensional (1D) charge transport mechanism in the DLC molecules is enabled in the columnar liquid crystalline (Dh) phase. The result indicates a high core-to-core correlation in the liquid crystal columnar phase, which has a ‘memory’ like effect that extends into isotropic phase at femtosecond timescale. This correlation is also confirmed through electrical conductivity measurement of DLCs, in which the electrical conductivity is enhanced in the DLC phase. DFT simulation was also carried out in order to elucidate the basic properties of HAT6 such as the band gap in the light of Raman spectra. An interesting outcome is that a freely unspecified boundary model produces in a more flexible molecule, resulting in a reduced band gap. Thus, this work provides an understanding of relationship between columnar order and electrical conductivity of HAT6 molecule, and potential strategy for design of DLCs in electronics application. Taylor & Francis 2018 Article PeerReviewed Sahamir, Shahrir Razey and Said, Suhana Mohd and Sabri, Mohd Faizul Mohd and Mahmood, Mohamand Syafie and Kamarudin, Muhammad Akmal and Moutanabbir, Oussama (2018) Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations. Liquid Crystals, 45 (4). pp. 522-535. ISSN 0267-8292 https://doi.org/10.1080/02678292.2017.1359693 doi:10.1080/02678292.2017.1359693
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
Sahamir, Shahrir Razey
Said, Suhana Mohd
Sabri, Mohd Faizul Mohd
Mahmood, Mohamand Syafie
Kamarudin, Muhammad Akmal
Moutanabbir, Oussama
Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
description The vibrational property of 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6) discotic liquid crystal (DLC) material is investigated in this research by using temperature-dependent Raman spectroscopy technique. One-dimensional (1D) charge transport mechanism in the DLC molecules is enabled in the columnar liquid crystalline (Dh) phase. The result indicates a high core-to-core correlation in the liquid crystal columnar phase, which has a ‘memory’ like effect that extends into isotropic phase at femtosecond timescale. This correlation is also confirmed through electrical conductivity measurement of DLCs, in which the electrical conductivity is enhanced in the DLC phase. DFT simulation was also carried out in order to elucidate the basic properties of HAT6 such as the band gap in the light of Raman spectra. An interesting outcome is that a freely unspecified boundary model produces in a more flexible molecule, resulting in a reduced band gap. Thus, this work provides an understanding of relationship between columnar order and electrical conductivity of HAT6 molecule, and potential strategy for design of DLCs in electronics application.
format Article
author Sahamir, Shahrir Razey
Said, Suhana Mohd
Sabri, Mohd Faizul Mohd
Mahmood, Mohamand Syafie
Kamarudin, Muhammad Akmal
Moutanabbir, Oussama
author_facet Sahamir, Shahrir Razey
Said, Suhana Mohd
Sabri, Mohd Faizul Mohd
Mahmood, Mohamand Syafie
Kamarudin, Muhammad Akmal
Moutanabbir, Oussama
author_sort Sahamir, Shahrir Razey
title Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
title_short Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
title_full Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
title_fullStr Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
title_full_unstemmed Studies on relation between columnar order and electrical conductivity in HAT6 discotic liquid crystals using temperature-dependent Raman spectroscopy and DFT calculations
title_sort studies on relation between columnar order and electrical conductivity in hat6 discotic liquid crystals using temperature-dependent raman spectroscopy and dft calculations
publisher Taylor & Francis
publishDate 2018
url http://eprints.um.edu.my/20821/
https://doi.org/10.1080/02678292.2017.1359693
_version_ 1643691389621370880
score 13.211869

Similar Items