TY - JOUR

T1 - Domain structure in an unoriented lamellar lyotropic liquid crystal phase studied by 2H NMR

AU - Dvinskikh, S. V.

AU - Furó, I.

PY - 2001/10/16

Y1 - 2001/10/16

N2 - The spatial variation of the phase director in an unoriented lamellar lyotropic liquid crystal is investigated by 2H two-dimensional and one-dimensional exchange and PGSE NMR. Exchange NMR probes the single-particle orientational correlation function of D2O molecules that diffuse among regions with different director orientations. The obtained correlation time and the water diffusion coefficient, measured by 2H PGSE NMR, provide the persistence length of director orientation that is defined as domain size. The nature of spatial variation is revealed by the decay of the 2H stimulated echo signal recorded with different evolution times. The persistence length of the director is found to be strongly dependent on the rate of cooling the sample from its isotropic phase.

AB - The spatial variation of the phase director in an unoriented lamellar lyotropic liquid crystal is investigated by 2H two-dimensional and one-dimensional exchange and PGSE NMR. Exchange NMR probes the single-particle orientational correlation function of D2O molecules that diffuse among regions with different director orientations. The obtained correlation time and the water diffusion coefficient, measured by 2H PGSE NMR, provide the persistence length of director orientation that is defined as domain size. The nature of spatial variation is revealed by the decay of the 2H stimulated echo signal recorded with different evolution times. The persistence length of the director is found to be strongly dependent on the rate of cooling the sample from its isotropic phase.

UR - http://www.scopus.com/inward/record.url?scp=0035900137&partnerID=8YFLogxK

U2 - 10.1021/la010693c

DO - 10.1021/la010693c

M3 - Article

AN - SCOPUS:0035900137

VL - 17

SP - 6455

EP - 6460

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 21

ER -