| 초록 |
Soft materials, such as polymer, colloidal suspension, gel, liquid crystal, or biological materials, share a common feature in that their physical behaviors occur at an energy scale ~ kT. Among these materials, hydrogels are characterized by their solid-like behaviors despite the majority of volume being occupied by water. Owing to such qualities, i.e. being soft, physically structured, and high water content, hydrogels can undergo a large voumetric change through a delicate balance between entropy and enthalpy, which are affected by a change in environmental conditions. Here, I will describe how we use such stimuli-responsive hydrogels to create dynamic, shape-controllable hydrogel micro-systems. Based on application of mechanical constraints on swelling of hydrogel, we created 1) hydrogel sheets that buckle into desired 3D morphologies through a locally differential swelling, and 2) dynamic surfaces that display or sequester surface biomolecular patterns. |
