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Optical anisotropy in micromechanically rolled carbon nanotube forest

The bulk appearance of arrays of vertically aligned carbon nanotubes (VACNT arrays or CNT forests) is dark as they absorb most of the incident light. In this paper, two postprocessing techniques have been described where the CNT forest can be patterned by selective bending of the tips of the nanot...

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Main Authors:	Mohd Razib, Mohd Asyraf, Rana, Masud, Saleh, Tanveer, Fan, Harrison, Koch, Andrew, Nojeh, Alireza, Takahata, Kenichi, Asan Gani, Abdul Muthalif
Format:	Article
Language:	English English English
Published:	Springer International Publishing AG. 2017
Subjects:	T Technology (General)
Online Access:	http://irep.iium.edu.my/56670/1/Article.pdf http://irep.iium.edu.my/56670/9/56672_Optical%20anisotropy%20in%20micromechanically_SCOPUS.pdf http://irep.iium.edu.my/56670/10/56672_Optical%20anisotropy%20in%20micromechanically_MYRA.pdf http://irep.iium.edu.my/56670/ https://link.springer.com/article/10.1007/s13391-017-6422-0
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spelling	my.iium.irep.566702019-09-11T09:12:36Z http://irep.iium.edu.my/56670/ Optical anisotropy in micromechanically rolled carbon nanotube forest Mohd Razib, Mohd Asyraf Rana, Masud Saleh, Tanveer Fan, Harrison Koch, Andrew Nojeh, Alireza Takahata, Kenichi Asan Gani, Abdul Muthalif T Technology (General) The bulk appearance of arrays of vertically aligned carbon nanotubes (VACNT arrays or CNT forests) is dark as they absorb most of the incident light. In this paper, two postprocessing techniques have been described where the CNT forest can be patterned by selective bending of the tips of the nanotubes using a rigid cylindrical tool. A tungsten tool was used to bend the vertical structure of CNTs with predefined parameters in two different ways as stated above: bending using the bottom surface of the tool (micromechanical bending (M2B)) and rolling using the side of the tool (micromechanical rolling (M2R)). The processed zone was investigated using a Field Emission Scanning Electron Microscope (FESEM) and optical setup to reveal the surface morphology and optical characteristics of the patterned CNTs on the substrate. Interestingly, the polarized optical reflection from the micromechanical rolled (M2R) sample was found to be significantly influenced by the rotation of the sample. It was observed that, if the polarization of the light is parallel to the alignment of the CNTs, the reflectance is at least 2 x higher than for the perpendicular direction. Furthermore, the reflectance varied almost linearly with good repeatability (~10%) as the processed CNT forest sample was rotated from 0° to 90°. Springer International Publishing AG. 2017-09-01 Article NonPeerReviewed application/pdf en http://irep.iium.edu.my/56670/1/Article.pdf application/pdf en http://irep.iium.edu.my/56670/9/56672_Optical%20anisotropy%20in%20micromechanically_SCOPUS.pdf application/pdf en http://irep.iium.edu.my/56670/10/56672_Optical%20anisotropy%20in%20micromechanically_MYRA.pdf Mohd Razib, Mohd Asyraf and Rana, Masud and Saleh, Tanveer and Fan, Harrison and Koch, Andrew and Nojeh, Alireza and Takahata, Kenichi and Asan Gani, Abdul Muthalif (2017) Optical anisotropy in micromechanically rolled carbon nanotube forest. Electronic Materials Letters, 13 (5). pp. 442-448. ISSN 1738-8090 E-ISSN 2093-6788 https://link.springer.com/article/10.1007/s13391-017-6422-0 10.1007/s13391-017-6422-0
institution	Universiti Islam Antarabangsa Malaysia
building	IIUM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	International Islamic University Malaysia
content_source	IIUM Repository (IREP)
url_provider	http://irep.iium.edu.my/
language	English English English
topic	T Technology (General)
spellingShingle	T Technology (General) Mohd Razib, Mohd Asyraf Rana, Masud Saleh, Tanveer Fan, Harrison Koch, Andrew Nojeh, Alireza Takahata, Kenichi Asan Gani, Abdul Muthalif Optical anisotropy in micromechanically rolled carbon nanotube forest
description	The bulk appearance of arrays of vertically aligned carbon nanotubes (VACNT arrays or CNT forests) is dark as they absorb most of the incident light. In this paper, two postprocessing techniques have been described where the CNT forest can be patterned by selective bending of the tips of the nanotubes using a rigid cylindrical tool. A tungsten tool was used to bend the vertical structure of CNTs with predefined parameters in two different ways as stated above: bending using the bottom surface of the tool (micromechanical bending (M2B)) and rolling using the side of the tool (micromechanical rolling (M2R)). The processed zone was investigated using a Field Emission Scanning Electron Microscope (FESEM) and optical setup to reveal the surface morphology and optical characteristics of the patterned CNTs on the substrate. Interestingly, the polarized optical reflection from the micromechanical rolled (M2R) sample was found to be significantly influenced by the rotation of the sample. It was observed that, if the polarization of the light is parallel to the alignment of the CNTs, the reflectance is at least 2 x higher than for the perpendicular direction. Furthermore, the reflectance varied almost linearly with good repeatability (~10%) as the processed CNT forest sample was rotated from 0° to 90°.
format	Article
author	Mohd Razib, Mohd Asyraf Rana, Masud Saleh, Tanveer Fan, Harrison Koch, Andrew Nojeh, Alireza Takahata, Kenichi Asan Gani, Abdul Muthalif
author_facet	Mohd Razib, Mohd Asyraf Rana, Masud Saleh, Tanveer Fan, Harrison Koch, Andrew Nojeh, Alireza Takahata, Kenichi Asan Gani, Abdul Muthalif
author_sort	Mohd Razib, Mohd Asyraf
title	Optical anisotropy in micromechanically rolled carbon nanotube forest
title_short	Optical anisotropy in micromechanically rolled carbon nanotube forest
title_full	Optical anisotropy in micromechanically rolled carbon nanotube forest
title_fullStr	Optical anisotropy in micromechanically rolled carbon nanotube forest
title_full_unstemmed	Optical anisotropy in micromechanically rolled carbon nanotube forest
title_sort	optical anisotropy in micromechanically rolled carbon nanotube forest
publisher	Springer International Publishing AG.
publishDate	2017
url	http://irep.iium.edu.my/56670/1/Article.pdf http://irep.iium.edu.my/56670/9/56672_Optical%20anisotropy%20in%20micromechanically_SCOPUS.pdf http://irep.iium.edu.my/56670/10/56672_Optical%20anisotropy%20in%20micromechanically_MYRA.pdf http://irep.iium.edu.my/56670/ https://link.springer.com/article/10.1007/s13391-017-6422-0
_version_	1646012412059451392
score	13.211869

Optical anisotropy in micromechanically rolled carbon nanotube forest

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