MOLECULAR-SCALE IMAGING OF CLAY MINERAL SURFACES WITH THE ATOMIC FORCE MICROSCOPE

被引：81

作者：

HARTMAN, H

SPOSITO, G

YANG, A

MANNE, S

GOULD, SAC

HANSMA, PK

机构：

[1] UNIV CALIF BERKELEY,DEPT SOIL SCI,BERKELEY,CA 94720

[2] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

来源：

CLAYS AND CLAY MINERALS | 1990年 / 38卷 / 04期

关键词：

D O I：

10.1346/CCMN.1990.0380401

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Specimen samples of Crook County montmorillonite and Silver Hill illite, purified and prepared in the Na-form, were imaged under 80% relative humidity using an atomic force microscope. The direct images showed clearly the hexagonal array of hexagonal rings of oxygen ions expected for the basal planes of 2:1 phyllosilicates. Fourier transformation of the digital information obtained by the microscope scanning tip led to an estimate of 5.1 ± 0.3 Å for the nearest-neighbor separation, in agreement with the ideal nearest-neighbor spacing of 5.4 Å for hexagonal rings as derived from X-ray powder diffraction data. The atomic force microscope should prove to be a useful tool for the molecular-scale resolution of clay mineral surfaces that contain adsorbed macromolecules. -Authors

引用

页码：337 / 342

页数：6

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