Rolling origami with smart materials

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（15）
• 页码范围: 1080-1082
• 页数: 3页
• 语种: 英文

摘要

Three-dimensional (3D) functional devices have become an interesting topic meeting the challenge of device miniaturization and high integration in electron devices and microelectromechanical systems.Based on this exciting situation,origami in micro/nanoscale combining art and advanced science was widely utilized to transform two-dimensional (2D) sheets into 3D microstructures for various applications,such as micro-grippers [1] (Fig.1a),3D photodetectors [2],ultrasensitive sensors [3],robots [4],and energy devices [5].Gradually,researchers explored classes of origami methods in micro/nanoscale originated from different principles as buckling,folding and bending [6,7].Among various methods,rolling origami is a tantalizing technique which rolls 2D patterns up by internal stress to transform into 3D microstructures.Rolling origami provides a convenient way to in situ convert ultra-thin nanomembranes into rolled-up 3D structures.Moreover,rolled-up microstructures not only contain different geometries as tubes,and helices,but also permit all kinds of materials ranging from polymers to metals and oxides [8,9].Recently,3D functional devices based on rolled-up microstructures with smart materials were added into the functional device family.Smart materials are a large group of materials which have responsive behavior with external stimuli.Benefiting from the high energy density,strain sensitive and soft properties of curly nanomembranes,rolled-up microstructures with smart materials perform quick response ability and large deformation amplitude,which pave the way towards responsive 3D micro/nanostructures.Herein,we introduced two works [10,11] to give a glimpse into the great potential of 3D functional micro/nanostructures based on rolling origami combined with smart materials.