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Wearable medical devices, such as the soft exoskeletons that provide support for stroke patients or controlled drug delivery patches, have to be made of materials that can adapt intelligently and ...
Three-dimensional (3D) printing allows for significant simplifications in the design cycle through the obvious ease with which complex geometries can be manufactured. However, the resulting components have a fixed set of properties that depend on the geometric design and inherent material properties of the printing material. Four-dimensional (4D) printing relaxes this rigidity in geometry and structural characteristics and provides means to alter and tune the resulting response. The tunability in properties can be achieved through various routes. This chapter is focused on 4D printing structur...