The maintained interstitials in twisted carbon nanotube bundles under bending deformation

Byeonghwa Goh; Joonmyung Choi

doi:10.1016/j.xcrp.2025.102443

The maintained interstitials in twisted carbon nanotube bundles under bending deformation

Byeonghwa Goh
, Joonmyung Choi

Hanyang University

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

1 Scopus citations

Abstract

The bending of twisted multi-walled carbon nanotube (MWCNT) bundles is vital for enhancing the electrochemical performance of medical implants, yet the underlying mechanics are not fully understood. Here, we report the bending behavior of micrometer-scale MWCNT bundles using a specialized coarse-grained model designed for densely packed, highly aligned MWCNT bundles. We reveal that radial gradients of bias angle of the interior bundle are crucial for maintaining its structure during bending. A straightforward mapping technique is proposed to monitor changes in the interstitial surface during bending by tracking coarse-grained particle density. This study lays the groundwork for designing stronger, more efficient MWCNT bundles for medical devices that must perform reliably in the dynamic environment of the body.

Original language	English
Article number	102443
Journal	Cell Reports Physical Science
Volume	6
Issue number	2
DOIs	https://doi.org/10.1016/j.xcrp.2025.102443
State	Published - 19 Feb 2025
Externally published	Yes

Keywords

bending
interstitial space
mechanical properties
mesoscale particle dynamics simulation
multi-walled carbon nanotube bundle
twisting

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10.1016/j.xcrp.2025.102443

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abstract = "The bending of twisted multi-walled carbon nanotube (MWCNT) bundles is vital for enhancing the electrochemical performance of medical implants, yet the underlying mechanics are not fully understood. Here, we report the bending behavior of micrometer-scale MWCNT bundles using a specialized coarse-grained model designed for densely packed, highly aligned MWCNT bundles. We reveal that radial gradients of bias angle of the interior bundle are crucial for maintaining its structure during bending. A straightforward mapping technique is proposed to monitor changes in the interstitial surface during bending by tracking coarse-grained particle density. This study lays the groundwork for designing stronger, more efficient MWCNT bundles for medical devices that must perform reliably in the dynamic environment of the body.",

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AB - The bending of twisted multi-walled carbon nanotube (MWCNT) bundles is vital for enhancing the electrochemical performance of medical implants, yet the underlying mechanics are not fully understood. Here, we report the bending behavior of micrometer-scale MWCNT bundles using a specialized coarse-grained model designed for densely packed, highly aligned MWCNT bundles. We reveal that radial gradients of bias angle of the interior bundle are crucial for maintaining its structure during bending. A straightforward mapping technique is proposed to monitor changes in the interstitial surface during bending by tracking coarse-grained particle density. This study lays the groundwork for designing stronger, more efficient MWCNT bundles for medical devices that must perform reliably in the dynamic environment of the body.

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The maintained interstitials in twisted carbon nanotube bundles under bending deformation

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Keywords

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