Patterning of dielectric nanoparticles using dielectrophoretic forces generated by ferroelectric polydomain films
Patterning of dielectric nanoparticles using dielectrophoretic forces generated by ferroelectric polydomain films
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利用铁电多域薄膜产生的介电泳力对介电纳米颗粒进行图案化
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
J. Fousek
中科院分区：
文献类型：
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作者：
P. Mokry;M. Marvan;J. Fousek
介电泳力的理论研究，即，给出了铁电畴图形产生的非均匀电场中电中性粒子所受的力。几位研究人员已经表明，在铁电单晶中具有给定几何形状的人工制备的畴图案代表了使用介电泳力图案化介电纳米物体的简单而灵活的方法。介电电泳力的来源是一个强大的和高度不均匀的（杂散）电场，它存在于附近的铁电畴壁在铁电膜的表面。我们分析了介电电泳力的模型中的铁电薄膜的厚度与层状180°畴图案。计算了考虑自由电荷屏蔽效应时，薄膜上表面上方离子液体中杂散场的空间分布的解析公式。日变化的空间分布。
A theoretical study of a dielectrophoretic force, i.e., the force acting on an electrically neutral particle in the inhomogeneous electric field, which is produced by a ferroelectric domain pattern, is presented. It has been shown by several researchers that artificially prepared domain patterns with given geometry in ferroelectric single crystals represent an easy and flexible method for patterning dielectric nanoobjects using dielectrophoretic forces. The source of the dielectrophoretic force is a strong and highly inhomogeneous (stray) electric field, which exists in the vicinity of the ferroelectric domain walls at the surface of the ferroelectric film. We analyzed dielectrophoretic forces in the model of a ferroelectric film of a given thickness with a lamellar 180° domain pattern. The analytical formula for the spatial distribution of the stray field in the ionic liquid above the top surface of the film is calculated including the effect of free charge screening. The spatial distribution of the diel...