对N. Sharifi-Mood，I.B. Liu，K.J. Stebe，软物质11，6768（2015），arXiv：1502.01672
Comment on "Curvature capillary migration of microspheres" by N. Sharifi-Mood, I.B. Liu, K.J. Stebe, Soft Matter 11, 6768 (2015), arXiv:1502.01672
摘要：
在最近的一篇论文中，Sharifi-Mood等人研究了被捕获在具有相反主曲率$c_{1}=-c_{2}$的液体界面处的胶体颗粒。在理论部分，他们声称在$Δc=c_{1}-c_{2}$中，俘获能在二级消失，这将使我们以前的结果无效[Phys.Rev.E74，041402（2006）]。在这里，我们表明，这一主张产生于变形场的外边界条件的不当处理。对于固定接触线和移动接触线，我们发现外边界是无关的，这证实了我们以前的工作。更一般地，我们表明，捕获能量是由接近粒子的变形，并不依赖于远场。
英文摘要：
In a recent paper, Sharifi-Mood et al. study colloidal particles trapped at a liquid interface with opposite principal curvatures $c_{1}=-c_{2}$. In the theory part, they claim that the trapping energy vanishes at second order in $Δc=c_{1}-c_{2}$, which would invalidate our previous result [Phys. Rev. E 74, 041402 (2006)]. Here we show that this claim arises from an improper treatment of the outer boundary condition on the deformation field. For both pinned and moving contact lines, we find that the outer boundary is irrelevant, which confirms our previous work. More generally, we show that the trapping energy is determined by the deformation close to the particle and does not depend on the far-field.
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