SHEAR-INDUCED HEXAGONAL ORDERING OBSERVED IN AN IONIC VISCOELASTIC FLUID IN FLOW PAST A SURFACE

被引：59

作者：

HAMILTON, WA

BUTLER, PD

BAKER, SM

SMITH, GS

HAYTER, JB

MAGID, LJ

PYNN, R

机构：

[1] UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996

[2] LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545

[3] UNIV KENTUCKY,DEPT CHEM,LEXINGTON,KY 40506

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.72.2219

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first clear evidence of a shear induced hexagonal phase in a polyionic fluid in flow past a plane quartz surface. The dilute surfactant solution studied is viscoelastic due to the formation and entanglement of highly extended charged threadlike micelles many thousands of A long, which arc known to align along the flow direction under shear. Small-angle neutron diffraction data show that in the high shear region within a few tens of microns of the surface these micelles not only align, but form a remarkably well ordered hexagonal array separated by 370 angstrom, 8 times their 46 angstrom diameter.

引用

页码：2219 / 2222

页数：4

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