Additively manufactured electronics (AMEs), also known as printed electronics, are becoming increasingly important for the anticipated Internet of Things (IoT). Current techniques rely on ink-based printing technologies such as inkjet and aerosol jet printers, which highly suffer from contamination, expensive formulation procedures, and limited materials sources, making it challenging to print pure and multimaterial devices. Here, a multimaterial additive nanomanufacturing (M-ANM) technique utilizing directed laser deposition at the nano and microscale is demonstrated, allowing the printing of lateral and vertical hybrid structures and devices. This M-ANM technique involves pulsed laser ablation of solid targets placed on a target carousel inside the printer head for in-situ generation of contamination-free nanoparticles, which are then directed toward the nozzle and laser-sintered in real-time to form desired patterns and structures layer-by-layer. Different materials, such as Ag, Cu, ZnO, TiO2, BTO, Al2O3, etc, are printed in a single-step process. The quality and versatility of our M-ANM technique offer a potential manufacturing option for emerging IoT.
Currently, printed electronics are manufactured by wet printing technologies such as inkjet and aerosol jet printers, which suffer from major drawbacks, including complex and expensive ink formulations, surfactants/contaminants, limited sources of inks, and the need for high-temperature post-processing. This talk will present a novel additive nanomanufacturing and dry printing technology for multimaterial printing of electronics, sensors, and energy devices. This technology allows in-situ and on-demand generation of various pure nanoparticles (metals, semiconductors, insulators, etc) in the printer head that are then directed toward the printer nozzle and laser-sintered in real-time to form desired patterns and structures layer-by-layer.
The use of printed electronics is rising fast as we move toward the internet of things (IoT). Today, most printed electronics are printed on nonbiodegradable polymers resulting in an exponential increase in E-waste formation. The current printing technologies are liquid/ink-based which are not compatible with biodegradable substrates such as papers. Here, we introduce a novel dry printing method to print conductive silver patterns on biodegradable papers. The effect of different printing parameters on the paper burning threshold is investigated, and the electrical characteristics of the lines are characterized for different line thicknesses and widths. Furthermore, the mechanical properties of the lines are studied by bending, twisting, and adhesion tests. This dry printing technology can pave the way toward eco-friendly and biodegradable papertronics.
Printing pure and multimaterial structures and devices in a single process is still in its infancy. Current electronic printing are ink-based technologies that suffer from ink contaminations, complex ink formulation, and limited sources of printing ink making it difficult to print pure and multimaterial structures and devices. Here, for the first time, we report a novel dry multimaterial 3D printing technology which allows printing multiple materials such as barium titanate (BTO), titanium dioxide (TiO2), tin oxide (SnO), zinc oxide (ZnO), aluminum oxide (Al2O3) and silver (Ag) on flexible substrates in a single step process. Flexible ZnO-based photodetectors and flexible electronics are printed and tested to demonstrate the huge impact of this technology on the future of printed electronics, sensors, and energy devices.
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