The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Neste estudo, nanotubos de carbono alinhados verticalmente (VA-CNTs) foram cultivados a partir de filmes LB com adição de carga e AlFe acumulado2O4 nanopartículas e ácido palmítico (C16) como molécula de enchimento após diferentes temperaturas de redução de hidrogênio de 500°C e 750°C, e os VA-CNTs cultivados foram comparados e avaliados. Como resultado, o comprimento dos VA-CNTs foi aproximadamente duplicado após 500°Redução de hidrogênio C em comparação com 750°Redução de hidrogênio C quando AlFe2O4 NPs foram usados. Por outro lado, quando a razão de área do catalisador foi diminuída com o uso de ácido palmítico, ou seja, a distância entre os CNTs foi aumentada, os VA-CNTs encurtaram rapidamente após 500°redução de hidrogênio C e VA-CNTs não foram mais obtidos mesmo na faixa em que VA-CNTs foram obtidos em 750°Redução de hidrogênio C. Os diâmetros interno e externo dos VA-CNTs diminuíram com a diminuição da razão de área do catalisador em 750°C redução de hidrogênio e tendeu a aumentar em 500°Redução de hidrogênio C. Observou-se que a morfologia das nanopartículas do catalisador após CVD muda significativamente dependendo da temperatura de redução do hidrogênio e da razão da área do catalisador. Estas observações indicam que o estado das nanopartículas catalisadoras imediatamente antes do processo de crescimento do CNT afeta grandemente as propriedades físicas dos CNTs.
Shohei SAKURAI
Chiba University
Mayu IIDA
Chiba University
Kosei OKUNUKI
Chiba University
Masahito KUSHIDA
Chiba University
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Shohei SAKURAI, Mayu IIDA, Kosei OKUNUKI, Masahito KUSHIDA, "Effect of the State of Catalytic Nanoparticles on the Growth of Vertically Aligned Carbon Nanotubes" in IEICE TRANSACTIONS on Electronics,
vol. E106-C, no. 6, pp. 208-213, June 2023, doi: 10.1587/transele.2022OMP0005.
Abstract: In this study, vertically aligned carbon nanotubes (VA-CNTs) were grown from filler-added LB films with accumulated AlFe2O4 nanoparticles and palmitic acid (C16) as the filler molecule after different hydrogen reduction temperatures of 500°C and 750°C, and the grown VA-CNTs were compared and evaluated. As a result, VA-CNTs were approximately doubled in length after 500°C hydrogen reduction compared to 750°C hydrogen reduction when AlFe2O4 NPs were used. On the other hand, when the catalyst area ratio was decreased by using palmitic acid, i.e., the distance between CNTs was increased, VA-CNTs rapidly shortened after 500°C hydrogen reduction, and VA-CNTs were no longer obtained even in the range where VA-CNTs were obtained in 750°C hydrogen reduction. The inner and outer diameters of VA-CNTs decreased with decreasing catalyst area ratio at 750°C hydrogen reduction and tended to increase at 500°C hydrogen reduction. The morphology of the catalyst nanoparticles after CVD was observed to change significantly depending on the hydrogen reduction temperature and catalyst area ratio. These observations indicate that the state of the catalyst nanoparticles immediately before the CNT growth process greatly affects the physical properties of the CNTs.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2022OMP0005/_p
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@ARTICLE{e106-c_6_208,
author={Shohei SAKURAI, Mayu IIDA, Kosei OKUNUKI, Masahito KUSHIDA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Effect of the State of Catalytic Nanoparticles on the Growth of Vertically Aligned Carbon Nanotubes},
year={2023},
volume={E106-C},
number={6},
pages={208-213},
abstract={In this study, vertically aligned carbon nanotubes (VA-CNTs) were grown from filler-added LB films with accumulated AlFe2O4 nanoparticles and palmitic acid (C16) as the filler molecule after different hydrogen reduction temperatures of 500°C and 750°C, and the grown VA-CNTs were compared and evaluated. As a result, VA-CNTs were approximately doubled in length after 500°C hydrogen reduction compared to 750°C hydrogen reduction when AlFe2O4 NPs were used. On the other hand, when the catalyst area ratio was decreased by using palmitic acid, i.e., the distance between CNTs was increased, VA-CNTs rapidly shortened after 500°C hydrogen reduction, and VA-CNTs were no longer obtained even in the range where VA-CNTs were obtained in 750°C hydrogen reduction. The inner and outer diameters of VA-CNTs decreased with decreasing catalyst area ratio at 750°C hydrogen reduction and tended to increase at 500°C hydrogen reduction. The morphology of the catalyst nanoparticles after CVD was observed to change significantly depending on the hydrogen reduction temperature and catalyst area ratio. These observations indicate that the state of the catalyst nanoparticles immediately before the CNT growth process greatly affects the physical properties of the CNTs.},
keywords={},
doi={10.1587/transele.2022OMP0005},
ISSN={1745-1353},
month={June},}
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TY - JOUR
TI - Effect of the State of Catalytic Nanoparticles on the Growth of Vertically Aligned Carbon Nanotubes
T2 - IEICE TRANSACTIONS on Electronics
SP - 208
EP - 213
AU - Shohei SAKURAI
AU - Mayu IIDA
AU - Kosei OKUNUKI
AU - Masahito KUSHIDA
PY - 2023
DO - 10.1587/transele.2022OMP0005
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E106-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2023
AB - In this study, vertically aligned carbon nanotubes (VA-CNTs) were grown from filler-added LB films with accumulated AlFe2O4 nanoparticles and palmitic acid (C16) as the filler molecule after different hydrogen reduction temperatures of 500°C and 750°C, and the grown VA-CNTs were compared and evaluated. As a result, VA-CNTs were approximately doubled in length after 500°C hydrogen reduction compared to 750°C hydrogen reduction when AlFe2O4 NPs were used. On the other hand, when the catalyst area ratio was decreased by using palmitic acid, i.e., the distance between CNTs was increased, VA-CNTs rapidly shortened after 500°C hydrogen reduction, and VA-CNTs were no longer obtained even in the range where VA-CNTs were obtained in 750°C hydrogen reduction. The inner and outer diameters of VA-CNTs decreased with decreasing catalyst area ratio at 750°C hydrogen reduction and tended to increase at 500°C hydrogen reduction. The morphology of the catalyst nanoparticles after CVD was observed to change significantly depending on the hydrogen reduction temperature and catalyst area ratio. These observations indicate that the state of the catalyst nanoparticles immediately before the CNT growth process greatly affects the physical properties of the CNTs.
ER -