Effect of secondary structure on the self-assembly of amphiphilic molecules: a multiscale simulation study |
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Authors: | Mondal Jagannath Yethiraj Arun |
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Institution: | Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA. |
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Abstract: | The self-assembly of amphiphilic molecules is of interest from a fundamental and practical standpoint. There has been recent interest in a class of molecules made from β-amino acids (which contain an additional backbone carbon atom when compared with natural amino acids). Block copolymers of β-peptides, where one block is hydrophobic and the other is hydrophilic, self-assemble into micelles. In this work, we use computer simulations to provide insight into the effect of secondary structure on the self-assembly of these molecules. Atomistic simulations for the free energy of association of a pair of molecules show that a homochiral hydrophobic block promotes self assembly compared to a heterochiral hydrophobic block, consistent with experiment. Simulations of a coarse-grained model show that these molecules spontaneously form spherical micelles. |
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