Superlattice formation in a binary mixture of block copolymer micelles

Sayeed Abbas, Timothy P. Lodge

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19 Scopus citations

Abstract

A binary solution mixture of distinct block copolymer micelles is found to adopt a superlattice. The larger micelles, formed from polystyrene-polyisoprene diblocks, have a nominal radius of 29nm; the smaller micelles, formed from polystyrene-polydimethylsiloxane diblocks, have a nominal radius of 16nm. The superlattice unit cell dimension is 156nm and is assigned to space group Fm3̄c; it corresponds to the AB13 structure. As these diblocks are uncharged, the driving force for superlattice formation is primarily free volume entropy, as in sterically stabilized colloidal hard spheres.

Original languageEnglish (US)
Article number097803
JournalPhysical Review Letters
Volume97
Issue number9
DOIs
StatePublished - Sep 20 2006

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