Thin end of the wedge: A block molecule, which consists of a rigid wedge-shaped aromatic segment linked at its apex to a flexible poly(ethylene oxide) chain, self-assembles into cylindrical nanofibers in both polar and nonpolar solvents. The structure of the nanofibers changes reversibly in response to solvent polarity, from highly flexible coil-like cylinders in water to stiff rodlike aggregates in n-hexane (see picture).
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Kim et al. (2006) studied this question.
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