Inward growth by nucleation: Multiscale self-assembly of ordered membranes

Jasper Landman, Samia Ouhajji, Sylvain Prévost, Theyencheri Narayanan, Jan Groenewold, Albert P. Philipse, Willem K. Kegel, Andrei V. Petukhov

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Samenvatting

Striking morphological similarities found between superstructures of a wide variety of seemingly unrelated crystalline membrane systems hint at the existence of a common formation mechanism. Resembling systems such as multiwalled carbon nanotubes, bacterial protein shells, or peptide nanotubes, the self-assembly of SDS/b-cyclodextrin complexes leads to monodisperse multilamellar microtubes. We uncover the mechanism of this hierarchical self-assembly process by time-resolved small- and ultrasmall-angle x-ray scattering. In particular, we show that symmetric crystalline bilayers bend into hollow cylinders as a consequence of membrane line tension and an anisotropic elastic modulus. Starting from single-walled microtubes, successive nucleation of new cylinders inside preexisting ones drives an inward growth. As both the driving forces that underlie the self-assembly behavior and the resulting morphologies are common to systems of ordered membranes, we believe that this formation mechanism has a similarly general applicability.

Originele taal-2Engels
Artikelnummereaat1817
TijdschriftScience Advances
Volume4
Nummer van het tijdschrift6
DOI's
StatusGepubliceerd - 29 jun 2018

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Landman, J., Ouhajji, S., Prévost, S., Narayanan, T., Groenewold, J., Philipse, A. P., ... Petukhov, A. V. (2018). Inward growth by nucleation: Multiscale self-assembly of ordered membranes. Science Advances, 4(6), [eaat1817]. https://doi.org/10.1126/sciadv.aat1817