Surviving structure in colloidal suspensions squeezed from 3D to 2D.
Surviving structure in colloidal suspensions squeezed from 3D to 2D.
复制标题
胶体悬浮液中的残存结构从 3D 挤压到 2D。
DOI：
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发表时间：
2008
影响因子：
8.6
通讯作者：
R. von Klitzing
中科院分区：
文献类型：
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作者：
S. Klapp;Yan Zeng;D. Qu;R. von Klitzing
结合胶体探针实验和计算机模拟，我们分析了被限制在不同厚度h薄膜中的带电二氧化硅胶体的溶剂化力F。我们表明，当h足够大时，表征F(h)的振荡是由体径向分布函数的主导波长决定的。因此，这两个量表现出相同的幂律密度依赖关系。这是第一个直接的证据，在一个可以通过实验和模拟处理的系统中，证明体和约束中的结构波长是一致的，与密度泛函理论的预测一致。此外，理论和实验数据在定量上是非常一致的。
Combining colloidal-probe experiments and computer simulations, we analyze the solvation forces F of charged silica colloids confined in films of various thicknesses h. We show that the oscillations characterizing F(h), for sufficiently large h, are determined by the dominant wavelength of the bulk radial distribution function. As a consequence, both quantities display the same power-law density dependence. This is the first direct evidence, in a system treatable both by experiment and by simulation, that the structural wavelength in bulk and confinement coincide, in agreement with predictions from density functional theory. Moreover, theoretical and experimental data are in excellent quantitative agreement.