ANISOTROPIC CRYSTAL-GROWTH OF THE S-LAYER OF BACILLUS-SPHAERICUS CCM-2177 AT THE AIR/WATER INTERFACE

被引:43
作者
PUM, D [1 ]
SLEYTR, UB [1 ]
机构
[1] UNIV AGR SCI,LUDWIG BOLTZMANN INST MOLEC NANOTECHNOL,A-1180 VIENNA,AUSTRIA
关键词
AIR/WATER INTERFACE; ANISOTROPIC CRYSTAL GROWTH; BACILLUS SPHAERICUS CCM 2177;
D O I
10.1016/0927-7757(95)03190-O
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
The isolated subunits of the crystalline bacterial cell surface layer (S-layer) from Bacillus sphaericus CCM 2177 show an inherent ability to reassemble at the air/water interface. The most important parameter for the recrystallization process is the calcium concentration in the subphase. Depending on this parameter, a broad spectrum of crystal morphologies ranging from tenuous, fractal-like structures to large monocrystalline patches was found. Crosscorrelation averaging was used for identifying the position and orientation of morphological units in the crystal lattice and for improving the signal-to-noise ratio of fine image details. Under optimized recrystallization conditions, large perfectly crystalline monolayers were formed. Such large monolayers are the basis for using S-layers as patterning structures in molecular nanotechnology.
引用
收藏
页码:99 / 104
页数:6
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