| 초록 |
Shape-reconfiguration of micropillar arrays was manifested by programming alignment of magnetic particles within polymer matrix. Previous studies have predominantly reported actuation of cylindrical micropillars where the stiffness distribution is radially balanced, inducing attenuation of actuation with unfocused momentum. Alternatively, we demonstrate the effects of anisotropic geometry on magnetic actuation using rectangular form factor. As the fundamental quadrangular polygon has only four edges, rectangular geometry is advantageous to compare numerically calculated stress distribution of pillars with experimentally measured actuation degree of pillars. Long axis of rectangle has larger bending stiffness than short axis of that, resulting in concentrated magnetic momentum on actuation along long axis of micropillars. We will discuss the relationships between geometry factors of micropillars and magnetic actuation as well as wetting properties. |
