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Illustration of the thermoreversible helical nanofibres, lamellar phase transition undergone by DPUPC in water. Proposed model for the helical nanofibres (A and B): (A) two molecules of DPUPC forming the basic repeat unit of the helical structure shown in (B). (B) Drawing of one helical strand (helical pitch 7.0 ± 0.5 nm, diameter 4.2 ± 0.5 nm). (C) Drawing of the multilamellar organization [reprinted with permission from (20). Copyright (2004) American Chemical Society].
