Microwave frequency characteristics of magnetically functionalized carbon nanotube arrays

Vladimir A. Labunov; Vadim A. Bogush; Alena L. Prudnikava; Boris G. Shulitski; Ivan V. Komissarov; Alexander S. Basaev; Beng Kang Tay; Maziar Shakersadeh

doi:10.1109/TEMC.2012.2182772

Microwave frequency characteristics of magnetically functionalized carbon nanotube arrays

Vladimir A. Labunov^*, Vadim A. Bogush, Alena L. Prudnikava, Boris G. Shulitski, Ivan V. Komissarov, Alexander S. Basaev, Beng Kang Tay, Maziar Shakersadeh

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

This paper reports the results of a comprehensive study of the interaction of electromagnetic radiation (EMR) of the wide frequency range (8-12, 26-37, and 78-118 GHz) with arrays of vertically aligned and disordered carbon nanotubes (CNTs) which have been obtained by the floating catalyst chemical vapor deposition method. The obtained nanotubes represent a composite of multiwall CNTs with encapsulated magnetic nanoparticles of iron phases, i.e., magnetically functionalized nanotubes (MFCNTs). MFCNTs were formed on silicon substrates, and disordered arrays in the form of powder were obtained by separating the MFCNT arrays mechanically from the walls of the quartz reactor. The frequency dependences of the reflection and transmission coefficients of EMR of MFCNTs of two types were investigated. The high electromagnetic shielding efficiency (40 dB) of MFCNTs associated with the reflection of electromagnetic waves was detected. Possible mechanisms of attenuation of electromagnetic signals by aligned and disordered MFCNTs were discussed.

Original language	English
Article number	6144723
Pages (from-to)	70-80
Number of pages	11
Journal	IEEE Transactions on Electromagnetic Compatibility
Volume	54
Issue number	1
DOIs	https://doi.org/10.1109/TEMC.2012.2182772
Publication status	Published - Feb 2012
Externally published	Yes

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

Keywords

Carbon nanotubes (CNTs)
electromagnetic radiation (EMR)
microwave frequency
shielding

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10.1109/TEMC.2012.2182772

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title = "Microwave frequency characteristics of magnetically functionalized carbon nanotube arrays",

abstract = "This paper reports the results of a comprehensive study of the interaction of electromagnetic radiation (EMR) of the wide frequency range (8-12, 26-37, and 78-118 GHz) with arrays of vertically aligned and disordered carbon nanotubes (CNTs) which have been obtained by the floating catalyst chemical vapor deposition method. The obtained nanotubes represent a composite of multiwall CNTs with encapsulated magnetic nanoparticles of iron phases, i.e., magnetically functionalized nanotubes (MFCNTs). MFCNTs were formed on silicon substrates, and disordered arrays in the form of powder were obtained by separating the MFCNT arrays mechanically from the walls of the quartz reactor. The frequency dependences of the reflection and transmission coefficients of EMR of MFCNTs of two types were investigated. The high electromagnetic shielding efficiency (40 dB) of MFCNTs associated with the reflection of electromagnetic waves was detected. Possible mechanisms of attenuation of electromagnetic signals by aligned and disordered MFCNTs were discussed.",

keywords = "Carbon nanotubes (CNTs), electromagnetic radiation (EMR), microwave frequency, shielding",

author = "Labunov, {Vladimir A.} and Bogush, {Vadim A.} and Prudnikava, {Alena L.} and Shulitski, {Boris G.} and Komissarov, {Ivan V.} and Basaev, {Alexander S.} and Tay, {Beng Kang} and Maziar Shakersadeh",

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AU - Labunov, Vladimir A.

AU - Bogush, Vadim A.

AU - Prudnikava, Alena L.

AU - Shulitski, Boris G.

AU - Komissarov, Ivan V.

AU - Basaev, Alexander S.

AU - Tay, Beng Kang

AU - Shakersadeh, Maziar

PY - 2012/2

Y1 - 2012/2

N2 - This paper reports the results of a comprehensive study of the interaction of electromagnetic radiation (EMR) of the wide frequency range (8-12, 26-37, and 78-118 GHz) with arrays of vertically aligned and disordered carbon nanotubes (CNTs) which have been obtained by the floating catalyst chemical vapor deposition method. The obtained nanotubes represent a composite of multiwall CNTs with encapsulated magnetic nanoparticles of iron phases, i.e., magnetically functionalized nanotubes (MFCNTs). MFCNTs were formed on silicon substrates, and disordered arrays in the form of powder were obtained by separating the MFCNT arrays mechanically from the walls of the quartz reactor. The frequency dependences of the reflection and transmission coefficients of EMR of MFCNTs of two types were investigated. The high electromagnetic shielding efficiency (40 dB) of MFCNTs associated with the reflection of electromagnetic waves was detected. Possible mechanisms of attenuation of electromagnetic signals by aligned and disordered MFCNTs were discussed.

AB - This paper reports the results of a comprehensive study of the interaction of electromagnetic radiation (EMR) of the wide frequency range (8-12, 26-37, and 78-118 GHz) with arrays of vertically aligned and disordered carbon nanotubes (CNTs) which have been obtained by the floating catalyst chemical vapor deposition method. The obtained nanotubes represent a composite of multiwall CNTs with encapsulated magnetic nanoparticles of iron phases, i.e., magnetically functionalized nanotubes (MFCNTs). MFCNTs were formed on silicon substrates, and disordered arrays in the form of powder were obtained by separating the MFCNT arrays mechanically from the walls of the quartz reactor. The frequency dependences of the reflection and transmission coefficients of EMR of MFCNTs of two types were investigated. The high electromagnetic shielding efficiency (40 dB) of MFCNTs associated with the reflection of electromagnetic waves was detected. Possible mechanisms of attenuation of electromagnetic signals by aligned and disordered MFCNTs were discussed.

KW - Carbon nanotubes (CNTs)

KW - electromagnetic radiation (EMR)

KW - microwave frequency

KW - shielding

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Microwave frequency characteristics of magnetically functionalized carbon nanotube arrays

Abstract

ASJC Scopus Subject Areas

Keywords

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