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journal article·2025-05Open access

Chiral Lemniscate Formation in Magnetic Field Controlled Topological Fluid Flows

Matt Jellicoe, Zoe Gardner, Amjad E. H. Alotaibi, Kaylee E. Shoemaker, James M. Scott, Shiliang Wang, Badriah M. Alotaibi, Xuan Luo, Clarence Chuah, Christopher T. Gibson, Shan He, Kasturi Vimalanathan, Jason R. Gascooke, Xianjue Chen, Alison Rodger, Han Huang, Scott J. Dalgarno, Elsa Antunes, Gregory A. Weiss, Qin Li, Jamie S. Quinton, Colin L. Raston

Small· Volume 21· Issue 20
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Source abstract

Abstract

Abstract High shear spinning top (ST) typhoon‐like fluid flow in a rapidly rotating inclined tube within a vortex fluidic device (VFD) approaches homochirality throughout the liquid with toroids of bundled single‐walled carbon nanotubes (SWCNTs) twisted into stable chiral lemniscates (in the shape of Figure 8s), predominantly as the R‐or S‐structures, for the tube rotating clockwise (CW) or counterclockwise (CCW). However, this is impacted by the Earth's magnetic field (BE). Theory predicts 1–20 MPa pressure for their formation, with their absolute chirality determined from scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. Thus, the resultant lemniscate structures establish the absolute chirality of the inner and outer components of the ST flow. These chiral flows and lemniscates can be flipped to the opposite chirality by changing the orientation of the tube relative to the inclination angle of BE, by moving the geographical location. Special conditions prevail where the tangential angle of the outer and inner flow of the ST becomes periodically aligned with BE, which respectively dramatically reduce the formation of toroids (and thus lemniscates) and formation of lemniscates from the toroids formed by the double‐helical (DH) flow generated by side wall Coriolis forces and Faraday waves.
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Research context

Nanomaterials

OpenAlex topics: Magnetic and Electromagnetic Effects · Scientific Research and Discoveries · Origins and Evolution of Life

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Flinders Institute for Nanoscale Science and Technology College of Science and Engineering Flinders University Bedford Park SA 5042 Australia

Department of Chemistry University of California Irvine CA 92697‐2025 USA

Queensland Quantum and Advanced Technology Research Institute Griffith University Nathan QLD 4111 Australia

School of Engineering and Built Environment Griffith University Nathan QLD 4111 Australia

School of Physics Central South University Changsha 410083 P. R. China

Flinders Microscopy and Microanalysis College of Science and Engineering Flinders University Bedford Park SA 5042 Australia

School of Food and Pharmacy Zhejiang Ocean University Zhoushan Zhejiang 316022 P. R. China

School of Environmental and Life Sciences The University of Newcastle Callaghan NSW 2308 Australia

Research School of Chemistry Australian National University ACT 2601 Australia

School of Advanced Manufacturing Sun Yat‐sen University Shenzhen 518107 P. R. China

Institute of Chemical Sciences Heriot‐Watt University Riccarton Edinburgh Scotland EH14 4AS UK

College of Science and Engineering James Cook University Douglas Townsville QLD 4811 Australia

School of Food Technology and Natural Sciences Locked Bag 11222 Massey University Palmerston North 4442 New Zealand

Funding

Australian Research Council

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