Correlating Disorder Microstructure and Magnetotransport of Carbon Nanowalls

Mijaela Acosta Gentoiu; Rafael García Gutiérrez; José Joaquín Alvarado Pulido; Javier Montaño Peraza; Marius Volmer; Sorin Vizireanu; Stefan Antohe; Gheorghe Dinescu; Ricardo Alberto Rodriguez-Carvajal

doi:10.3390/app13042476

Correlating Disorder Microstructure and Magnetotransport of Carbon Nanowalls

Mijaela Acosta Gentoiu, Rafael García Gutiérrez, José Joaquín Alvarado Pulido, Javier Montaño Peraza, Marius Volmer, Sorin Vizireanu, Stefan Antohe, Gheorghe Dinescu, Ricardo Alberto Rodriguez-Carvajal^*

^*Corresponding author for this work

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

2 Scopus citations

Abstract

The carbon nanowalls (CNWs) grown by Plasma-Enhanced CVD reveal differences in the magnetotransport properties depending on the synthesis parameters. In this paper, we report the influence of the deposition temperature, which produces variations of the disorder microstructure of the CNWs. Relative low disorder leads to the weak localization with the transition to weak antilocalization. Higher disorder generates positive Hopping mechanism in low field with a crossover to a diffusion transport by graphene nanocrystallites. The samples reveal a similitude of the isoline density of the MR at a low temperature (<50 K), explained in the context of the magnetization. This effect is independent of the number of defects. We can achieve a desirable amount of control over the MT properties changing the CNWs’ microstructure.

Original language	English
Article number	2476
Journal	Applied Sciences (Switzerland)
Volume	13
Issue number	4
DOIs	https://doi.org/10.3390/app13042476
State	Published - Feb 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

Keywords

disorder
graphene
magnetotransport
nanowalls

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10.3390/app13042476

Cite this

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title = "Correlating Disorder Microstructure and Magnetotransport of Carbon Nanowalls",

abstract = "The carbon nanowalls (CNWs) grown by Plasma-Enhanced CVD reveal differences in the magnetotransport properties depending on the synthesis parameters. In this paper, we report the influence of the deposition temperature, which produces variations of the disorder microstructure of the CNWs. Relative low disorder leads to the weak localization with the transition to weak antilocalization. Higher disorder generates positive Hopping mechanism in low field with a crossover to a diffusion transport by graphene nanocrystallites. The samples reveal a similitude of the isoline density of the MR at a low temperature (<50 K), explained in the context of the magnetization. This effect is independent of the number of defects. We can achieve a desirable amount of control over the MT properties changing the CNWs{\textquoteright} microstructure.",

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doi = "10.3390/app13042476",

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volume = "13",

journal = "Applied Sciences (Switzerland)",

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AU - Acosta Gentoiu, Mijaela

AU - García Gutiérrez, Rafael

AU - Alvarado Pulido, José Joaquín

AU - Montaño Peraza, Javier

AU - Volmer, Marius

AU - Vizireanu, Sorin

AU - Antohe, Stefan

AU - Dinescu, Gheorghe

AU - Rodriguez-Carvajal, Ricardo Alberto

PY - 2023/2

Y1 - 2023/2

N2 - The carbon nanowalls (CNWs) grown by Plasma-Enhanced CVD reveal differences in the magnetotransport properties depending on the synthesis parameters. In this paper, we report the influence of the deposition temperature, which produces variations of the disorder microstructure of the CNWs. Relative low disorder leads to the weak localization with the transition to weak antilocalization. Higher disorder generates positive Hopping mechanism in low field with a crossover to a diffusion transport by graphene nanocrystallites. The samples reveal a similitude of the isoline density of the MR at a low temperature (<50 K), explained in the context of the magnetization. This effect is independent of the number of defects. We can achieve a desirable amount of control over the MT properties changing the CNWs’ microstructure.

AB - The carbon nanowalls (CNWs) grown by Plasma-Enhanced CVD reveal differences in the magnetotransport properties depending on the synthesis parameters. In this paper, we report the influence of the deposition temperature, which produces variations of the disorder microstructure of the CNWs. Relative low disorder leads to the weak localization with the transition to weak antilocalization. Higher disorder generates positive Hopping mechanism in low field with a crossover to a diffusion transport by graphene nanocrystallites. The samples reveal a similitude of the isoline density of the MR at a low temperature (<50 K), explained in the context of the magnetization. This effect is independent of the number of defects. We can achieve a desirable amount of control over the MT properties changing the CNWs’ microstructure.

KW - disorder

KW - graphene

KW - magnetotransport

KW - nanowalls

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DO - 10.3390/app13042476

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ER -

Correlating Disorder Microstructure and Magnetotransport of Carbon Nanowalls

Abstract

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Keywords

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