Writhing and hockling instabilities in twisted elastic fibers
| Autor: | Adam Fortais, Elsie Loukiantchenko, Kari Dalnoki-Veress |
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| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter - Materials Science
Quantitative Biology::Biomolecules Biophysics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences DNA 02 engineering and technology Surfaces and Interfaces General Chemistry Condensed Matter - Soft Condensed Matter Elastic Tissue 021001 nanoscience & nanotechnology 01 natural sciences 0103 physical sciences Soft Condensed Matter (cond-mat.soft) General Materials Science 010306 general physics 0210 nano-technology Biotechnology |
| Zdroj: | The European Physical Journal E. 44 |
| ISSN: | 1292-895X 1292-8941 |
| Popis: | The buckling and twisting of slender, elastic fibers is a deep and well-studied field. A slender elastic rod that is twisted with respect to a fixed end will spontaneously form a loop, or hockle, to relieve the torsional stress that builds. Further twisting results in the formation of plectonemes -- a helical excursion in the fiber that extends with additional twisting. Here we use an idealized, micron-scale experiment to investigate the energy stored, and subsequently released, by hockles and plectonemes as they are pulled apart, in analogy with force spectroscopy studies of DNA and protein folding. Hysteresis loops in the snapping and unsnapping inform the stored energy in the twisted fiber structures. Comment: 7 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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