The role of the AC signal on the dielectrophoretic assembly of carbon nanotubes across indium tin oxide electrodes

Abdullah Abdulhameed; Mohd Nazim Mohtar; Mohd Nizar Hamidon; Ishak Mansor; Izhal Abdul Halin

doi:10.1016/j.mee.2021.111597

The role of the AC signal on the dielectrophoretic assembly of carbon nanotubes across indium tin oxide electrodes

Abdullah Abdulhameed^*, Mohd Nazim Mohtar, Mohd Nizar Hamidon, Ishak Mansor, Izhal Abdul Halin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Multi-walled carbon nanotubes (MWCNTs) can be aligned along electric field lines between transparent electrodes to form a conductive network. In this work, MWCNTs were successfully deposited across indium tin oxide (ITO) electrodes using dielectrophoretic (DEP) force. For the first time, the deposition of MWCNTs across ITO electrodes separated by a distance of 50 μm is demonstrated to form an aligned network. The role of the AC signal amplitude, frequency, and duration is investigated experimentally. We found that the alignment was improved as the frequency increases (>10⁵ Hz), while the minimum amplitude per the unit distance to deposit MWCNTs across ITO electrodes was 0.2 V/μm. The deposition process is observed in real-time using optical microscopy, and the aligned MWCNTs are observed with FeSEM spectroscopy. The study also investigates the resistivity, density and length of the aligned MWCNTs as a function of time. The deposition of MWCNTs across transparent electrodes using a room temperature method that requires a simple setup has potential use in future transparent electronics.

Original language	English
Article number	111597
Journal	Microelectronic Engineering
Volume	247
DOIs	https://doi.org/10.1016/j.mee.2021.111597
State	Published - 15 Jul 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

Alignment
Carbon nanotubes
Dielectrophoresis
ITO
Transparent sensors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Surfaces, Coatings and Films
Electrical and Electronic Engineering

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10.1016/j.mee.2021.111597

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title = "The role of the AC signal on the dielectrophoretic assembly of carbon nanotubes across indium tin oxide electrodes",

abstract = "Multi-walled carbon nanotubes (MWCNTs) can be aligned along electric field lines between transparent electrodes to form a conductive network. In this work, MWCNTs were successfully deposited across indium tin oxide (ITO) electrodes using dielectrophoretic (DEP) force. For the first time, the deposition of MWCNTs across ITO electrodes separated by a distance of 50 μm is demonstrated to form an aligned network. The role of the AC signal amplitude, frequency, and duration is investigated experimentally. We found that the alignment was improved as the frequency increases (>105 Hz), while the minimum amplitude per the unit distance to deposit MWCNTs across ITO electrodes was 0.2 V/μm. The deposition process is observed in real-time using optical microscopy, and the aligned MWCNTs are observed with FeSEM spectroscopy. The study also investigates the resistivity, density and length of the aligned MWCNTs as a function of time. The deposition of MWCNTs across transparent electrodes using a room temperature method that requires a simple setup has potential use in future transparent electronics.",

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author = "Abdullah Abdulhameed and Mohtar, {Mohd Nazim} and Hamidon, {Mohd Nizar} and Ishak Mansor and Halin, {Izhal Abdul}",

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AU - Abdulhameed, Abdullah

AU - Mohtar, Mohd Nazim

AU - Hamidon, Mohd Nizar

AU - Mansor, Ishak

AU - Halin, Izhal Abdul

PY - 2021/7/15

Y1 - 2021/7/15

N2 - Multi-walled carbon nanotubes (MWCNTs) can be aligned along electric field lines between transparent electrodes to form a conductive network. In this work, MWCNTs were successfully deposited across indium tin oxide (ITO) electrodes using dielectrophoretic (DEP) force. For the first time, the deposition of MWCNTs across ITO electrodes separated by a distance of 50 μm is demonstrated to form an aligned network. The role of the AC signal amplitude, frequency, and duration is investigated experimentally. We found that the alignment was improved as the frequency increases (>105 Hz), while the minimum amplitude per the unit distance to deposit MWCNTs across ITO electrodes was 0.2 V/μm. The deposition process is observed in real-time using optical microscopy, and the aligned MWCNTs are observed with FeSEM spectroscopy. The study also investigates the resistivity, density and length of the aligned MWCNTs as a function of time. The deposition of MWCNTs across transparent electrodes using a room temperature method that requires a simple setup has potential use in future transparent electronics.

AB - Multi-walled carbon nanotubes (MWCNTs) can be aligned along electric field lines between transparent electrodes to form a conductive network. In this work, MWCNTs were successfully deposited across indium tin oxide (ITO) electrodes using dielectrophoretic (DEP) force. For the first time, the deposition of MWCNTs across ITO electrodes separated by a distance of 50 μm is demonstrated to form an aligned network. The role of the AC signal amplitude, frequency, and duration is investigated experimentally. We found that the alignment was improved as the frequency increases (>105 Hz), while the minimum amplitude per the unit distance to deposit MWCNTs across ITO electrodes was 0.2 V/μm. The deposition process is observed in real-time using optical microscopy, and the aligned MWCNTs are observed with FeSEM spectroscopy. The study also investigates the resistivity, density and length of the aligned MWCNTs as a function of time. The deposition of MWCNTs across transparent electrodes using a room temperature method that requires a simple setup has potential use in future transparent electronics.

KW - Alignment

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KW - Transparent sensors

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The role of the AC signal on the dielectrophoretic assembly of carbon nanotubes across indium tin oxide electrodes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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