Direct measurement of entropic forces induced by rigid rods.
Direct measurement of entropic forces induced by rigid rods.
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DOI：
10.1103/physrevlett.90.048301
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发表时间：
2003-01
影响因子：
8.6
通讯作者：
L. Helden;R. Roth;G. Koenderink;P. Leiderer;C. Bechinger
中科院分区：
文献类型：
--
作者：
L. Helden;R. Roth;G. Koenderink;P. Leiderer;C. Bechinger
We present the first direct depletion potential measurements for a single colloidal sphere close to a wall in a suspension of rigid colloidal rods. Since all particle interactions are as good as hard-core-like, the depletion potentials are of entirely entropic origin. We developed a density functional theory approach that accurately accounts for this experimental situation. The depletion potentials calculated for different rod number densities are in very good quantitative agreement with the experimental results.
