Epitaxial crystal growth of charged colloids.
Epitaxial crystal growth of charged colloids.
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带电胶体的外延晶体生长。
DOI：
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发表时间：
2002
影响因子：
8.6
通讯作者：
A. Blaaderen
中科院分区：
文献类型：
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作者：
Jacob P. Hoogenboom;Anand Yethiraj;A. V. Langen;J. Romijn;A. Blaaderen
在一个长程排斥、密度匹配的胶体系统中，一种带电线的排斥模式被证明可引导三维（3D）结晶。在体相行为导致体心立方（bcc）结晶的体积分数下，发现一维模板会诱导形成亚稳态的面心立方（fcc）晶体。体心立方晶体以（100）面或（110）面取向，伴有二重孪晶，且平行于模板。该模板还诱导了（100）面的预冻结。在模板与粒子间距存在较大失配时，一维链在三维晶体的表层形成。
A pattern of repulsive, charged lines is shown to direct three-dimensional (3D) crystallization in a system of long-range repulsive, density-matched colloids. At volume fractions where the bulk phase behavior leads to bcc crystallization, the 1D template was found to induce formation of a metastable fcc crystal. The bcc crystals were oriented with the (100) or the (110) plane, with twofold twinning, parallel to the template. The template further induced prefreezing of the (100) plane. At a large mismatch between template and interparticle spacing, 1D strings form in the surface layer of a 3D crystal.