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Accurately measuring the dielectric properties of anisotropic materials is challenging due to their fragility and small size. This study addressed these issues for vertically aligned carbon nanotubes (VACNTs) by engineering them to delaminate from the substrate, retain orientation and porosity, and...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2024-12, Vol.72 (12), p.7087-7087
Main Authors: Lum, Lucas, Ng, Zhi Kai, Jiang, Rong Tao, Tan, Chong Wei, Teo, Edwin Hang Tong, Tay, Beng Kang
Format: Article
Language:English
Subjects:
Accuracy
Anisotropic
Anisotropy
Carbon nanotubes
carbon nanotubes (CNTs)
dielectric materials
dielectric measurement
Dielectric properties
Dielectrics
Fragility
Length measurement
permeability
Permittivity
Permittivity measurement
Rectangular waveguides
Size measurement
Substrates
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Summary:Accurately measuring the dielectric properties of anisotropic materials is challenging due to their fragility and small size. This study addressed these issues for vertically aligned carbon nanotubes (VACNTs) by engineering them to delaminate from the substrate, retain orientation and porosity, and grow to millimeter lengths. This approach allowed for effective use of the Nicolson-Ross-Weir (NRW) method without additional techniques. While alternative methods by Susek et al. and Knisely et al. might offer higher accuracy, the proposed method is practicable with commercially available equipment, achieving reliable dielectric measurements.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2024.3485246