Journal ArticleDOI
Additive Manufacturing of Metal Structures at the Micrometer Scale
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This work critically discusses and comparing the potential of current microscale metal AM techniques, and features the techniques of direct ink writing, electrohydrodynamic printing, laser-assisted electrophoretic deposition, Laser-induced forward transfer, local electroplating methods, lasers-induced photoreduction and focused electron or ion beam induced deposition.Abstract:
Currently, the focus of additive manufacturing (AM) is shifting from simple prototyping to actual production. One driving factor of this process is the ability of AM to build geometries that are not accessible by subtractive fabrication techniques. While these techniques often call for a geometry that is easiest to manufacture, AM enables the geometry required for best performance to be built by freeing the design process from restrictions imposed by traditional machining. At the micrometer scale, the design limitations of standard fabrication techniques are even more severe. Microscale AM thus holds great potential, as confirmed by the rapid success of commercial micro-stereolithography tools as an enabling technology for a broad range of scientific applications. For metals, however, there is still no established AM solution at small scales. To tackle the limited resolution of standard metal AM methods (a few tens of micrometers at best), various new techniques aimed at the micrometer scale and below are presently under development. Here, we review these recent efforts. Specifically, we feature the techniques of direct ink writing, electrohydrodynamic printing, laser-assisted electrophoretic deposition, laser-induced forward transfer, local electroplating methods, laser-induced photoreduction and focused electron or ion beam induced deposition. Although these methods have proven to facilitate the AM of metals with feature sizes in the range of 0.1-10 µm, they are still in a prototype stage and their potential is not fully explored yet. For instance, comprehensive studies of material availability and material properties are often lacking, yet compulsory for actual applications. We address these items while critically discussing and comparing the potential of current microscale metal AM techniques.read more
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Journal ArticleDOI
Additive manufacturing of 3D nano-architected metals
TL;DR: A lithography-based process to produce 3D nanoporous nickel nanolattices with octet geometries and a resolution of 100 nm is developed, demonstrating an efficient pathway to 3D-print micro-architected and nano- architected metals with sub-micron resolution.
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Printing Conductive Nanomaterials for Flexible and Stretchable Electronics: A Review of Materials, Processes, and Applications
Qijin Huang,Yong Zhu +1 more
TL;DR: In this article, a review of printable inks based on conductive nanomaterials is presented, which summarizes basic principles and recent development of common printing technologies, formulations of printed inks, deposition of conductive inks via different printing techniques, and performance enhancement by using various sintering methods.
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3D printed porous ceramic scaffolds for bone tissue engineering: a review.
Yu Wen,Sun Xun,Meng Haoye,Sun Baichuan,Chen Peng,Liu Xuejian,Zhang Kaihong,Yang Xuan,Peng Jiang,Lu Shibi +9 more
TL;DR: This study summarizes the recent research status and development of three-dimensional (3D)-printed porous ceramic scaffolds in bone tissue engineering and suggests new classes of bone graft substitutes can be developed.
Journal ArticleDOI
From intrinsic dielectric loss to geometry patterns: Dual-principles strategy for ultrabroad band microwave absorption
Bin Quan,Bin Quan,Weihua Gu,Jiaqi Sheng,Xinfeng Lv,Yuyi Mao,Lie Liu,Xiaogu Huang,Zongjun Tian,Guangbin Ji +9 more
TL;DR: In this paper, a dual-principle strategy has been proposed to make a better understanding of the impact of utilizing conductive absorption fillers coupled with implementing artificial structures design on the absorption performance.
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