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Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics

Surfactants such as sodium dodecyl sulfate (SDS) are used to improve the dispersity of carbon nanotubes (CNTs) in aqueous solutions. The surfactant concentration in CNT solutions is a critical factor in the dielectrophoretic (DEP) manipulation of CNTs. A high surfactant concentration causes a rapid...

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Main Authors: Abdulhameed, Abdullah, Halin, Izhal Abdul, Mohtar, Mohd Nazim, Hamidon, Mohd Nizar
Format: Article
Published: American Chemical Society 2022
Online Access:http://psasir.upm.edu.my/id/eprint/102410/
https://pubs.acs.org/doi/10.1021/acsomega.1c06323
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spelling my.upm.eprints.1024102023-05-22T01:59:06Z http://psasir.upm.edu.my/id/eprint/102410/ Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics Abdulhameed, Abdullah Halin, Izhal Abdul Mohtar, Mohd Nazim Hamidon, Mohd Nizar Surfactants such as sodium dodecyl sulfate (SDS) are used to improve the dispersity of carbon nanotubes (CNTs) in aqueous solutions. The surfactant concentration in CNT solutions is a critical factor in the dielectrophoretic (DEP) manipulation of CNTs. A high surfactant concentration causes a rapid increase in the solution conductivity, while a low concentration results in undesirably large CNT bundles within the solution. The increase in the solution conductivity causes drag velocity that obstructs the CNT manipulation process due to the electrothermal forces induced by the electric field. The presence of large CNT bundles is undesirable since they degrade the device performance. In this work, mathematical modeling and experimental work were used to optimize the concentration of the SDS surfactant in multiwalled carbon nanotube (MWCNT) solutions. The solutions were characterized using dynamic light scattering (DLS) and ultraviolet–visible spectroscopy (UV–Vis) analysis. We found that the optimum SDS concentration in MWCNT solutions for the successful DEP manipulation of MWCNTs was between 0.1 and 0.01 wt %. A novel DEP configuration was then used to assemble MWCNTs across transparent electrodes. The configuration was based on ceiling deposition, where the electrodes were on top of a droplet. The newly proposed configuration reduced the drag velocity and prevented the assembly of large MWCNT bundles. MWCNTs were successfully assembled and aligned across interdigitated electrodes (IDEs). The assembly of MWCNTs from aqueous solutions across transparent electrodes has potential use in future transparent electronics and sensor devices. American Chemical Society 2022-01-18 Article PeerReviewed Abdulhameed, Abdullah and Halin, Izhal Abdul and Mohtar, Mohd Nazim and Hamidon, Mohd Nizar (2022) Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics. ACS Omega, 7 (4). 3680 - 3688. ISSN 2470-1343 https://pubs.acs.org/doi/10.1021/acsomega.1c06323 10.1021/acsomega.1c06323
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Surfactants such as sodium dodecyl sulfate (SDS) are used to improve the dispersity of carbon nanotubes (CNTs) in aqueous solutions. The surfactant concentration in CNT solutions is a critical factor in the dielectrophoretic (DEP) manipulation of CNTs. A high surfactant concentration causes a rapid increase in the solution conductivity, while a low concentration results in undesirably large CNT bundles within the solution. The increase in the solution conductivity causes drag velocity that obstructs the CNT manipulation process due to the electrothermal forces induced by the electric field. The presence of large CNT bundles is undesirable since they degrade the device performance. In this work, mathematical modeling and experimental work were used to optimize the concentration of the SDS surfactant in multiwalled carbon nanotube (MWCNT) solutions. The solutions were characterized using dynamic light scattering (DLS) and ultraviolet–visible spectroscopy (UV–Vis) analysis. We found that the optimum SDS concentration in MWCNT solutions for the successful DEP manipulation of MWCNTs was between 0.1 and 0.01 wt %. A novel DEP configuration was then used to assemble MWCNTs across transparent electrodes. The configuration was based on ceiling deposition, where the electrodes were on top of a droplet. The newly proposed configuration reduced the drag velocity and prevented the assembly of large MWCNT bundles. MWCNTs were successfully assembled and aligned across interdigitated electrodes (IDEs). The assembly of MWCNTs from aqueous solutions across transparent electrodes has potential use in future transparent electronics and sensor devices.
format Article
author Abdulhameed, Abdullah
Halin, Izhal Abdul
Mohtar, Mohd Nazim
Hamidon, Mohd Nizar
spellingShingle Abdulhameed, Abdullah
Halin, Izhal Abdul
Mohtar, Mohd Nazim
Hamidon, Mohd Nizar
Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
author_facet Abdulhameed, Abdullah
Halin, Izhal Abdul
Mohtar, Mohd Nazim
Hamidon, Mohd Nizar
author_sort Abdulhameed, Abdullah
title Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
title_short Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
title_full Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
title_fullStr Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
title_full_unstemmed Optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
title_sort optimization of surfactant concentration in carbon nanotube solutions for dielectrophoretic ceiling assembly and alignment: implications for transparent electronics
publisher American Chemical Society
publishDate 2022
url http://psasir.upm.edu.my/id/eprint/102410/
https://pubs.acs.org/doi/10.1021/acsomega.1c06323
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score 13.211869

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