| Summary: | Materials Research Express
PAPER • THE FOLLOWING ARTICLE ISOPEN ACCESS
Characterization and selective deposition of carbon nanotubes from carbon nanoparticles mixture using mild acid treatment and electrokinetic manipulation
Abdullah Abdulhameed5,1,2, Mohd Nazim Mohtar2,3, Mohd Nizar Hamidon2,3, Ishak Mansor4 and Izhal Abdul Halin2
Published 26 May 2021 • © 2021 The Author(s). Published by IOP Publishing Ltd
Materials Research Express, Volume 8, Number 5
Citation Abdullah Abdulhameed et al 2021 Mater. Res. Express 8 055603
DOI 10.1088/2053-1591/ac017e
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Abstract
Particle manipulation is often required in the fabrication of microelectronic devices such as transistors and sensors. In this work, we succeeded in depositing aligned carbon nanotubes (CNTs) from an oxidized conglomerates carbon mixture using a simple low power procedure consisting of mild acid treatment and frequency-dependent dielectrophoretic (DEP) force. The treatment improved the dispersity and solubility of CNTs due to the functional groups introduced on their surface. The DEP force was generated with an AC signal of 1 MHz and 7.07 Vrms to attract the CNTs to a transparent electrode gap of 50 μm. Treatment quality was confirmed and characterized by Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), energy dispersive x-ray analysis (EDX) and high-resolution transmission electron microscopy (HRTEM). Ultraviolet-visible spectroscopy (UV-vis) and dynamic light scattering (DLS) were used to analyze the dispersity and solubility of carbon particles and their size distribution in different solvents. The morphology of the deposited CNTs and amorphous carbon were observed by optical microscope and field-emission scanning electron microscope (FESEM). The procedure used in this work is cost-effective, scalable and essential for future assembly. Furthermore, the transparency of the system makes it suitable for real-time observation, transparent sensors, and the ability to integrate it into microfluidic channels.
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