DLVO interaction energy between a sphere and a nano-patterned plate
DLVO interaction energy between a sphere and a nano-patterned plate
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DOI：
10.1016/j.colsurfa.2007.11.035
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发表时间：
2008-04
期刊：
影响因子：
--
通讯作者：
E. Martines;L. Csáderová;H. Morgan;A. Curtis;M. Riehle
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文献类型：
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作者：
E. Martines;L. Csáderová;H. Morgan;A. Curtis;M. Riehle
使用表面元素积分（SEI）技术确定微球和不同形状和尺寸的规则纳米形貌在1：1水性电解质之间的相互作用的势能。的高度和直径的正方形格子的圆柱形突起和中空的凸体的变化，以显示这些几何参数的相互作用能的影响。该模拟预测，纳米突起将降低粘附的能量势垒，这反过来将产生比DLVO（Derjaguin-Landau-Verwey-Overbeek）理论对光滑表面上的颗粒所预测的大得多的沉积速率。与实验观察定性一致，减小突起的曲率半径导致较低的能垒。然而，在100 mM下，表面上纳米凹坑的存在将增加能垒的高度，从而阻碍颗粒沉积。
The potential energy of interaction between a microsphere and regular nano-topographies of varying shape and dimensions in 1:1 aqueous electrolyte is determined using the surface element integration (SEI) technique. The height and diameter of a square-lattice of cylindrical protruding and hollow asperities are varied to show the influence of these geometric parameters on the interaction energy. The simulation predicts that the nano-protrusions would decrease the energy barrier towards adhesion, which in turn would yield much larger deposition rates than predicted by the DLVO (Derjaguin–Landau–Verwey–Overbeek) theory for particles on smooth surfaces. In qualitative agreement with experimental observations, decreasing the radius of curvature of the protrusions results in lower energy barriers. Inversely, at 100mM the presence of nano-pits on a surface would increase the height of the energy barrier, thus hampering particle deposition.