Example of various powder-based 3D-printed electrical and electronic application devices. (a) SS 316L monolithic corona ionizer arrays, diameter tip 300 μm. Reproduced with permission from [203]; (b,c) PBBJ 3D-printed B4C–Al composites complex collimator, minimum mesh size 1.5 mm. Reproduced with permission from [96]; (d) SLS 3D-printed PA11/BaTiO3 nanocomposite various complex structures. Reproduced with permission from [205]; (e,f) SEM image of SLM 3D-printed multiscale supercapacitor, pore size 150–200 μm. Reproduced with permission from [209]; (g) SLM 3D-printed shape-memory micro-actuators, thickness 55 µm. Reproduced with permission from [210].