Diffusiophoretic Self-Propulsion for Partially Catalytic Spherical Colloids
Diffusiophoretic Self-Propulsion for Partially Catalytic Spherical Colloids
复制标题
部分催化球形胶体的扩散电泳自推进
DOI：
10.1109/tnb.2015.2403255
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发表时间：
2014
影响因子：
3.9
通讯作者：
Christian Holm
中科院分区：
文献类型：
--
作者：
J. de Graaf;G. Rempfer;Christian Holm
当悬浮在过氧化氢溶液中时，具有部分铂表面涂层的胶体球执行自泳运动。我们提出了一个理论分析，这些粒子的自推进速度使用连续多组分，自扩散电泳模型。以这个模型为基础，我们展示了如何滑层近似可以得出，并在哪些限制，它持有。首先，我们考虑了全多分量模型和滑移层近似之间的差异。利用滑移模型论证和探讨了粒子速度对分子-表面相互作用细节的敏感性。我们发现一个很强的不对称性的依赖胶体的速度作为催化涂层的水平的函数，当有一个不同的溶质和溶剂分子之间的相互作用和惰性和催化部分的胶体，分别。甚至可以通过改变催化涂层的水平来反转运动方向。最后，我们调查这些结果的鲁棒性相对于在催化和惰性部分的颗粒之间的边缘附近的反应速率的变化。我们的结果是显着的兴趣的解释实验结果的自推进粒子的运动。
Colloidal spheres with a partial platinum surface coating perform autophoretic motion when suspended in hydrogen peroxide solution. We present a theoretical analysis of the self-propulsion velocity of these particles using a continuum multi-component, self-diffusiophoretic model. With this model as a basis, we show how the slip-layer approximation can be derived and in which limits it holds. First, we consider the differences between the full multi-component model and the slip-layer approximation. Then the slip model is used to demonstrate and explore the sensitive nature of the particle's velocity on the details of the molecule-surface interaction. We find a strong asymmetry in the dependence of the colloid's velocity as a function of the level of catalytic coating, when there is a different interaction between the solute and solvent molecules and the inert and catalytic part of the colloid, respectively. The direction of motion can even be reversed by varying the level of the catalytic coating. Finally, we investigate the robustness of these results with respect to variations in the reaction rate near the edge between the catalytic and inert parts of the particle. Our results are of significant interest to the interpretation of experimental results on the motion of self-propelled particles.
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影响因子：
1.8
作者：
Ebbens, S.;Gregory, D. A.;Golestanian, R.
通讯作者：
Golestanian, R.
影响因子：
17.1
作者：
Baraban, Larysa;Streubel, Robert;Cuniberti, Gianaurelio
通讯作者：
Cuniberti, Gianaurelio
活细胞内纳米棒电动机的声推进。
影响因子：
16.6
作者：
Wang, Wei;Li, Sixing;Mair, Lamar;Ahmed, Suzanne;Huang, Tony Jun;Mallouk, Thomas E.
通讯作者：
Mallouk, Thomas E.
影响因子：
17.1
作者：
Baraban, Larysa;Makarov, Denys;Schmidt, Oliver G.
通讯作者：
Schmidt, Oliver G.
影响因子：
2.4
作者：
Ebbens, Stephen;Tu, Mei-Hsien;Golestanian, Ramin
通讯作者：
Golestanian, Ramin