Two-dimensional electrohydrodynamically induced colloidal phases
Two-dimensional electrohydrodynamically induced colloidal phases
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DOI：
10.1021/la026241x
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发表时间：
2002-12-24
期刊：
影响因子：
3.9
通讯作者：
Marr, DWM
中科院分区：
文献类型：
--
作者：
Gong, TY;Wu, DT;Marr, DWM
在过去的十年中，实验表明，施加的电场可以用来组装胶体在电极表面通过一个明显的电流体动力学吸引相互作用。然而，最近人们发现，限制强烈地影响了这一过程，同时抑制了表观吸引力，同时增加了场致偶极-偶极排斥的相对重要性。通过改变限制的程度和施加的场的强度，可以改变这些竞争效应的相对大小。我们在这里表明，可以利用这种相互作用的新型二维胶体相的建设。
Over the past decade, experiments have shown that applied electric fields can be used to assemble colloids at electrode surfaces via an apparently electrohydrodynamic attractive interaction. Recently however, it has been seen that confinement strongly influences this process, simultaneously suppressing the apparent attractions while increasing the relative importance of field-induced dipole-dipole repulsions. By varying the degree of confinement and the strength of the applied field, one can alter the relative magnitude of these competing effects. We show here that one can take advantage of this interplay for the construction of novel two-dimensional colloidal phases.