Experimental evidence for proposed transformation pathway from the inverse hexagonal to inverse diamond cubic phase from oriented lipid samples

Adam M. Squires, Samina Akbar, Marissa E. Tousley, Yekaterina Rokhlenko, Jonathan P. Singer, Chinedum O. Osuji

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A macroscopically oriented inverse hexagonal phase (HII) of the lipid phytantriol in water is converted to an oriented inverse double diamond bicontinuous cubic phase (QIID). The initial HII phase is uniaxially oriented about the long axis of a capillary with the cylinders parallel to the capillary axis. The HII phase is converted by cooling to a QIID phase which is also highly oriented, where the cylindrical axis of the former phase has been converted to a ⟨110⟩ axis in the latter, as demonstrated by small-angle X-ray scattering. This epitaxial relationship allows us to discriminate between two competing proposed geometric pathways to convert HII to QIID. Our findings also suggest a new route to highly oriented cubic phase coatings, with applications as nanomaterial templates.
Original languageEnglish
Pages (from-to)7707-7711
JournalLangmuir
Volume31
Issue number28
DOIs
Publication statusPublished - 21 Jul 2015

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