Figure 1. A1) conical shape of surfactant molecules consisting of a hydrophilic headgroup (blue) and a hydrophobic alkyl chain (yellow). A2, A3) supramolecular aggregates of the surfactant in A1), showing how molecular geometry leads to formation of micelles. B1) cylindrical shape of typical lipid molecules, consisting of a hydrophilic headgroup and two hydrophobic alkyl chains. B2, B3) supramolecular aggregates of these molecules tend to form bilayer structures such as vesicles

From

Experiment on the Self-Aggregation of Amphiphiles

Elena von Hoff, Silan Toy, Thomas Waitz, Ingo Mey

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