DETERMINATION OF LATTICE STRUCTURE AND CALCULATION OF MOLECULAR TILT IN LIPID MONOLAYERS ON WATER USING X-RAY-DIFFRACTION

被引：72

作者：

BOHANON, TM ^{[1
]}

LIN, B ^{[1
]}

SHIH, MC ^{[1
]}

ICE, GE ^{[1
]}

DUTTA, P ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37830

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.41.4846

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the first determination of lattice structure for classical (fatty acid and alcohol) monolayer systems on the surface of water, based on our observation of first- and second-order x-ray diffraction peaks. Monolayers of both heneicosanoic acid and heneicosanol in the highest-pressure phase pack into a distorted hexagonal lattice with orthorhombic cell dimensions of a7.5 t/rA, b5.0 i/rA. From the observed peak intensities, we have calculated the molecular tilt directions and magnitudes, using the assumption (reasonable given the dense packing) that the chains are parallel to each other and in the all-trans configuration. the temperature range 05°C, the molecules tilt towards the b axis, but at higher temperatures the tilt direction changes to the a axis. © 1990 The American Physical Society.

引用

页码：4846 / 4849

页数：4

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