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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/9073

Title: Rhythmic pore dynamics in a shrinking lipid vesicle
Authors: Hamada, Tsutomu
Hirabayashi, Yuichi
Ohta, Takao
Takagi, Masahiro
Keywords: lipid membrane
Issue Date: 2009-11-24
Publisher: American Physical Society
Magazine name: Physical Review E
Volume: 80
Number: 5
Start page: 51921-1
End page: 51921-7
DOI: 10.1103/PhysRevE.80.051921
Abstract: The rhythmic motion of membrane pore behavior under nonequilibrium conditions was studied. Application of the surfactant triton X-100 (TX-100) caused lipid vesicles to exhibit two types of shrinking dynamics with pore generation, which depended on both the size of the vesicles and the concentration of added TX-100. Small vesicles and the addition of a low concentration of TX-100 resulted in rhythmic-pore dynamics, where a transient pore was generated within a vesicle in a repetitive manner. In contrast, large vesicles and a high concentration of TX-100 led to continuous-pore dynamics, where the vesicle maintained an open pore during the shrinking process. In the rhythmic-pore membrane, long-cycle oscillation was observed with large vesicles and a low concentration TX-100. The period of one cycle decreased with a decrease in the vesicle size and an increase in the TX-100 concentration. We discuss the mechanism of these trends by considering the elastic free energy of the membrane.
Rights: Tsutomu Hamada, Yuichi Hirabayashi, Takao Ohta, Masahiro Takagi, Physical Review E, 80(5), 2009, 51921-1-51921-7. Copyright 2009 by the American Physical Society. http://dx.doi.org/10.1103/PhysRevE.80.051921
URI: http://hdl.handle.net/10119/9073
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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