Fig. 3: Multi-functional 3D printing.
From: Integrated 3D printing of flexible electroluminescent devices and soft robots
a Schematic illustration of the multi-material DIW process for fabricating EL devices. ICE, IDE and ELE Inks were printed sequentially. b–d SEM images of the multi-layer structure of the 3DP samples (b), the interface between the ICE and ELE layers (c), and the interface between two ICE layers (d) of the 3DP samples. Scale bar: 200 μm (b) and 50 μm (c, d). e Simulated displacement distributions within the 3DP EL device (top) and a physically-laminated sample (bottom) at an overall applied strain of 35%. Both devices consisted of a ELE layer (with “SUSTech” logo) and an ICE layer. The simulation was performed via finite element analysis. Mechanically compliant and robust interface was evidenced in the 3DP EL device, while weak interface and interfacial delamination were detected for the physically-laminated EL device. f The designated CAD models and the images of the 3DP EL devices with multi-color electroluminescent components with alternative voltage on or off. Scale bar: 5 mm. g Images of a 3DP flexible EL wristband, indicating the stable electroluminescent features under mechanical deformation, such as bending and twisting. Scale bar: 1 cm.
