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Experimental Confirmation of Transformation Pathways between Inverse Double Diamond and Gyroid Cubic Phases

Seddon, Annela M.; Hallett, James; Beddoes, Charlotte; Plivelic, Tomás LU and Squires, Adam M. (2014) In Langmuir 30(20). p.5705-5710
Abstract
A macroscopically oriented double diamond inverse bicontinuous cubic phase (Q(II)(D)) of the lipid glycerol monooleate is reversibly converted into a gyroid phase (Q(II)(G)). The initial Q(II)(D) phase is prepared in the form of a film coating the inside of a capillary, deposited under flow, which produces a sample uniaxially oriented with a < 110 > axis parallel to the symmetry axis of the sample. A transformation is induced by replacing the water within the capillary tube with a solution of poly(ethylene glycol), which draws water out of the Q(II)(D) sample by osmotic stress. This converts the Q(II)(D) phase into a Q(II)(G) phase with two coexisting orientations, with the < 100 > and < 111 > axes parallel to the... (More)
A macroscopically oriented double diamond inverse bicontinuous cubic phase (Q(II)(D)) of the lipid glycerol monooleate is reversibly converted into a gyroid phase (Q(II)(G)). The initial Q(II)(D) phase is prepared in the form of a film coating the inside of a capillary, deposited under flow, which produces a sample uniaxially oriented with a < 110 > axis parallel to the symmetry axis of the sample. A transformation is induced by replacing the water within the capillary tube with a solution of poly(ethylene glycol), which draws water out of the Q(II)(D) sample by osmotic stress. This converts the Q(II)(D) phase into a Q(II)(G) phase with two coexisting orientations, with the < 100 > and < 111 > axes parallel to the symmetry axis, as demonstrated by small-angle X-ray scattering. The process can then be reversed, to recover the initial orientation of Q(II)(D) phase. The epitaxial relation between the two oriented mesophases is consistent with topology-preserving geometric pathways that have previously been hypothesized for the transformation. Furthermore, this has implications for the production of macroscopically oriented Q(II)(G) phases, in particular with applications as nanomaterial templates. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
30
issue
20
pages
5705 - 5710
publisher
The American Chemical Society
external identifiers
  • wos:000336641700003
  • scopus:84901468982
ISSN
0743-7463
DOI
10.1021/la5005837
language
English
LU publication?
yes
id
f67f14ae-904f-44d3-913f-303545b38fa0 (old id 4552645)
date added to LUP
2014-07-17 11:18:18
date last changed
2017-07-30 03:20:14
@article{f67f14ae-904f-44d3-913f-303545b38fa0,
  abstract     = {A macroscopically oriented double diamond inverse bicontinuous cubic phase (Q(II)(D)) of the lipid glycerol monooleate is reversibly converted into a gyroid phase (Q(II)(G)). The initial Q(II)(D) phase is prepared in the form of a film coating the inside of a capillary, deposited under flow, which produces a sample uniaxially oriented with a &lt; 110 &gt; axis parallel to the symmetry axis of the sample. A transformation is induced by replacing the water within the capillary tube with a solution of poly(ethylene glycol), which draws water out of the Q(II)(D) sample by osmotic stress. This converts the Q(II)(D) phase into a Q(II)(G) phase with two coexisting orientations, with the &lt; 100 &gt; and &lt; 111 &gt; axes parallel to the symmetry axis, as demonstrated by small-angle X-ray scattering. The process can then be reversed, to recover the initial orientation of Q(II)(D) phase. The epitaxial relation between the two oriented mesophases is consistent with topology-preserving geometric pathways that have previously been hypothesized for the transformation. Furthermore, this has implications for the production of macroscopically oriented Q(II)(G) phases, in particular with applications as nanomaterial templates.},
  author       = {Seddon, Annela M. and Hallett, James and Beddoes, Charlotte and Plivelic, Tomás and Squires, Adam M.},
  issn         = {0743-7463},
  language     = {eng},
  number       = {20},
  pages        = {5705--5710},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Experimental Confirmation of Transformation Pathways between Inverse Double Diamond and Gyroid Cubic Phases},
  url          = {http://dx.doi.org/10.1021/la5005837},
  volume       = {30},
  year         = {2014},
}