In the manufacturing of soft fibers at small scales, lack of considering the presence of surface tension may cause a significant shape deviation from the desired geometry due to the surface tension-induced fiber deformation. Here we develop an analytic algorithm to calculate the surface tension-induced deformation of soft nanofibers with different cross-section shapes. We prove that the displacement at the fiber cross-section boundary is independent of the cross-section size. Numerical examples demonstrate that upon surface tension nanofibers with circular cross-sections undergo radial shrinking and these with non-circular cross-sections are driven to rounder shapes. Moreover, the surface tension-induced cross-section area change is significant for non-circular soft nanofibers as their sizes fall below tens of nanometers.

在小规模的软纤维制造中，由于表面张力引起的纤维变形，缺乏考虑表面张力的存在可能导致与所需几何形状的明显形状偏差。在这里，我们开发了一种解析算法来计算具有不同横截面形状的软纳米纤维的表面张力引起的变形。我们证明纤维横截面边界处的位移与横截面尺寸无关。数值示例表明，在表面张力作用下，具有圆形横截面的纳米纤维会发生径向收缩，而具有非圆形横截面的纳米纤维会被驱动为更圆的形状。而且，由于非圆形软纳米纤维的尺寸下降到几十纳米以下，因此表面张力引起的横截面积变化是显着的。