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Thickness-radius relationship and spring constants of cholesterol helical ribbons

Author(s)
Benedek, George B.; Feld, Michael S.; Dasari, Ramachandra Rao; Sung, Yongjin; Hossain, Najeeb; Lomakin, Aleksey; Choi, Wonshik; Kozlova, Natalia; Khaykovich, Boris; ... Show more Show less
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Abstract
Using quantitative phase microscopy, we have discovered a quadratic relationship between the radius R and the thickness t of helical ribbons that form spontaneously in multicomponent cholesterol–surfactant mixtures. These helical ribbons may serve as mesoscopic springs to measure or to exert forces on nanoscale biological objects. The spring constants of these helices depend on their submicroscopic thickness. The quadratic relationship (R ∝ t[superscript 2]) between radius and thickness is a consequence of the crystal structure of the ribbons and enables a determination of the spring constant of any of our helices solely in terms of its observable geometrical dimensions.
Date issued
2009-08
URI
http://hdl.handle.net/1721.1/55291
Department
Massachusetts Institute of Technology. Center for Materials Science and Engineering; Massachusetts Institute of Technology. Materials Processing Center; Massachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Spectroscopy Laboratory; MIT Nuclear Reactor Laboratory
Journal
Proceedings of the National Academy of Sciences of the United States of America
Publisher
United States National Academy of Sciences
Citation
Khaykovich, Boris et al. “Thickness–radius relationship and spring constants of cholesterol helical ribbons.” Proceedings of the National Academy of Sciences 106.37 (2009): 15663-15666. © 2009 National Academy of Sciences
Version: Final published version
ISSN
1091-6490
0027-8424

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