3D microprinting of inorganic porous materials by chemical linking-induced solidification of nanocrystals

Minju Song, Yoonkyum Kim, Du San Baek, Ho Young Kim, Da Hwi Gu, Haiyang Li, Benjamin V. Cunning, Seong Eun Yang, Seung Hwae Heo, Seunghyun Lee, Minhyuk Kim, June Sung Lim, Hu Young Jeong, Jung-Woo Yoo, Sang Hoon Joo, Rodney S. Ruoff, Jin Young Kim () and Jae Sung Son ()
Additional contact information
Minju Song: Ulsan National Institute of Science and Technology (UNIST)
Yoonkyum Kim: Ulsan National Institute of Science and Technology (UNIST)
Du San Baek: Ulsan National Institute of Science and Technology (UNIST)
Ho Young Kim: Korea Institute of Science and Technology (KIST)
Da Hwi Gu: Ulsan National Institute of Science and Technology (UNIST)
Haiyang Li: Pohang University of Science and Technology (POSTECH)
Benjamin V. Cunning: Institute for Basic Science (IBS)
Seong Eun Yang: Ulsan National Institute of Science and Technology (UNIST)
Seung Hwae Heo: Pohang University of Science and Technology (POSTECH)
Seunghyun Lee: Ulsan National Institute of Science and Technology (UNIST)
Minhyuk Kim: Ulsan National Institute of Science and Technology (UNIST)
June Sung Lim: Ulsan National Institute of Science and Technology (UNIST)
Hu Young Jeong: Ulsan National Institute of Science and Technology (UNIST)
Jung-Woo Yoo: Ulsan National Institute of Science and Technology (UNIST)
Sang Hoon Joo: Seoul National University
Rodney S. Ruoff: Ulsan National Institute of Science and Technology (UNIST)
Jin Young Kim: Korea Institute of Science and Technology (KIST)
Jae Sung Son: Pohang University of Science and Technology (POSTECH)

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Three-dimensional (3D) microprinting is considered a next-generation manufacturing process for the production of microscale components; however, the narrow range of suitable materials, which include mainly polymers, is a critical issue that limits the application of this process to functional inorganic materials. Herein, we develop a generalised microscale 3D printing method for the production of purely inorganic nanocrystal-based porous materials. Our process is designed to solidify all-inorganic nanocrystals via immediate dispersibility control and surface linking-induced interconnection in the nonsolvent linker bath and thereby creates multibranched gel networks. The process works with various inorganic materials, including metals, semiconductors, magnets, oxides, and multi-materials, not requiring organic binders or stereolithographic equipment. Filaments with a diameter of sub-10 μm are printed into designed complex 3D microarchitectures, which exhibit full nanocrystal functionality and high specific surface areas as well as hierarchical porous structures. This approach provides the platform technology for designing functional inorganics-based porous materials.

Date: 2023
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DOI: 10.1038/s41467-023-44145-7

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