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Abstract: We report the results from a computational study of the self-assembly ofamphiphilic di-tethered nanospheres using molecular simulation. As a functionof the interaction strength and directionality of the tether-tetherinteractions, we predict the formation of four highly ordered phases notpreviously reported for nanoparticle systems. We find a double diamondstructure comprised of a zincblende binary diamond arrangement of sphericalmicelles with a complementary diamond network of nanoparticles ZnS-D; a phaseof alternating spherical micelles in a NaCl structure with a complementarysimple cubic network of nanoparticles to form an overall crystal structureidentical to that of AlCu 2Mn NaCl-SC; an alternating tetragonal orderedcylinder phase with a tetragonal mesh of nanoparticles described by the 8,8,4Archimedean tiling TC-T; and an alternating diamond phase in which bothdiamond networks are formed by the tethers AD within a nanoparticle matrix.We compare these structures with those observed in linear and star triblockcopolymer systems.



Author: Christopher R. Iacovella, Sharon C. Glotzer

Source: https://arxiv.org/







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