Hierarchically Organized Systems Based on Liquid Crystalline Phases - Self-Assembled Supramolecular Architectures: Lyotropic Liquid Crystals - page 171

(a) (b)

200 200

150

150

100

100

100 200 300

R oil [nm]

400 500 100 150 200 250

R cubo [nm]

Figure 6.9 Size changes due to material transfer. Radius ( R EME ) of the resulting EMEs
as a function of (a) initial emulsion oil droplet radius for three different n - alkanes and
(b) initial cubosome size (for a 50 : 50 mixture of cubosomes and oil emulsion). Data is
shown for n - decane (circles), n - tetradecane (squares), and n - octadecane (triangles).
The lines are linear fi ts to the data.

1,0

0.8

0.6

15.3

0.4

0.2

0.0 8

10 12 14 16 18 20

n -Alkane carbon chain length

Figure 6.10 Transfer rate is affected by the length of the hydrophobic component.
Rate of increase of radius ( R EME ) as a function of n - alkane carbon - chain length for
cubosomes (squares) and for oil emulsions (circles). [Taken from Salonen et al. (2010a).]
Further interesting examples of material transfer can be found in the original publica-
tions (Moitzi et al., 2007; Salonen et al., 2010a).

C-chain lipid) behaves like an alkane with about 15.3 carbons in such a com-
positional ripening. However, MLO is amphiphilic due to its glycerol moiety;
also, the molecule has extremely large inverse conical shape due to its two
(cis) double bonds. Thus its effective chain length is reduced (14.23 Å for pure
ML, according to unpublished results)(Kulkarni et al., 2010c).