PMID- 15974789
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070126
LR  - 20050624
IS  - 0021-9606 (Print)
IS  - 0021-9606 (Linking)
VI  - 122
IP  - 21
DP  - 2005 Jun 1
TI  - Kinetic pathway to double-gyroid structure.
PG  - 214906
AB  - We have investigated the structural development during order-order transitions to 
      the double-gyroid (DG) phase of nonionic surfactant/water systems based on 
      two-dimensional small-angle x-ray scattering patterns from highly oriented 
      ordered mesophases. The lamellar (L) to DG transition proceeds through two 
      intermediate structures, a fluctuating perforated layer structure having ABAB 
      stacking and a hexagonal perforated lamellar structure with ABCABC stacking 
      (HPLABC). For a hexagonally packed cylinder (H) to DG transition, we also 
      observed the HPLABC structure as the intermediate phase, thus the HPLABC is an 
      entrance structure for the DG phase. The hexagonal perforated lamellar (HPL) 
      structure consists of hexagonally packed holes surrounded by the planar tripods, 
      and the transition from HPL structure to the DG phase proceeds by rotation of the 
      dihedral angle of connected tripods. A geometrical consideration shows that large 
      deformations of HPL planes are necessary to form the DG structure from the HPLABC 
      structure, whereas the transition from a HPL structure with ABAB stacking (HPLAB) 
      to the DG structure is straightforward. In spite of the topological constraints, 
      the HPLABC structure is observed in the kinetic pathway to the DG structure.
FAU - Imai, M
AU  - Imai M
AD  - Department of Physics, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo, 
      Tokyo 112-8610, Japan. imai@phys.ocha.ac.jp
FAU - Sakai, K
AU  - Sakai K
FAU - Kikuchi, M
AU  - Kikuchi M
FAU - Nakaya, K
AU  - Nakaya K
FAU - Saeki, A
AU  - Saeki A
FAU - Teramoto, T
AU  - Teramoto T
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Chem Phys
JT  - The Journal of chemical physics
JID - 0375360
EDAT- 2005/06/25 09:00
MHDA- 2005/06/25 09:01
CRDT- 2005/06/25 09:00
PHST- 2005/06/25 09:00 [pubmed]
PHST- 2005/06/25 09:01 [medline]
PHST- 2005/06/25 09:00 [entrez]
AID - 10.1063/1.1905585 [doi]
PST - ppublish
SO  - J Chem Phys. 2005 Jun 1;122(21):214906. doi: 10.1063/1.1905585.