Tuning SWCNT Length to Optimize the Rate-Efficiency-Stability Triad in Nanofluidic Water Channels.

Shu-Peng Wang, Qi-Lin Zhang, Zhi-Jun Ma, Ju-Xiang Li, Zhen-Yan Lu, Rong-Yao Yang

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Article in Molecules (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Shu-Peng WangHunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials, School of Physics and Electronics, Hunan University of Science and Technology, Xiangtan 411201, China.ORCID 0009-0008-0642-8266

Qi-Lin ZhangSchool of Mathematics-Physics and Finance, Anhui Polytechnic University, Wuhu 241000, China.

Zhi-Jun MaHunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials, School of Physics and Electronics, Hunan University of Science and Technology, Xiangtan 411201, China.

Ju-Xiang LiSchool of Science, Sun Yat-sen University, Shenzhen Campus, Shenzhen 518107, China.

Zhen-Yan LuHunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials, School of Physics and Electronics, Hunan University of Science and Technology, Xiangtan 411201, China.ORCID 0000-0002-2629-3329

Rong-Yao YangHunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials, School of Physics and Electronics, Hunan University of Science and Technology, Xiangtan 411201, China.

Funding

the China Postdoctoral Science Foundation Grant No.~2021M690627the Fundamental Research Funds for the Central Universities Grant No.~2242022R20041the Hunan Provincial Natural Science Foundation of China Grant No.~2021JJ40188the National Natural Science Foundation of China Grant Nos.~12404240 and 12205093

6 · The paper itself

Abstract

This work shows that the length of single-walled carbon nanotubes is critical in governing the trade-off among the rate, efficiency, and stability of pressure-driven water transport. A critical length of 1.06 nm marks the transition in the transport mechanism from a thermal-fluctuation-dominated regime to an ordered water-chain mode. This transition is driven by the evolution of the potential of mean force with tube length, which progresses from a flat landscape to a high-barrier profile and ultimately forms a low-resistance tunnel in long nanotubes. Notably, this tunnel endows the water chain with an enhanced ability to restore its continuity, allowing it to bridge fracture gaps as wide as 7 Å even in the absence of an external pressure difference. These insights reveal a length-dependent mechanism that could revolutionize CNT-hydrogel hybrids for biomedical applications.

Indexed as

molecular dynamics simulationnanofluidicssingle-walled carbon nanotubeswater-chain bridging mechanismwater transport

Identifiers

PMID41375146

DOI10.3390/molecules30234548

PMCPMC12692946

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