3D printing of inorganic nanomaterials by photochemically bonding colloidal nanocrystals.
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| Title: | 3D printing of inorganic nanomaterials by photochemically bonding colloidal nanocrystals. |
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| Authors: | Li, Fu, Liu, Shao-Feng, Liu, Wangyu, Hou, Zheng-Wei, Jiang, Jiaxi, Fu, Zhong, Wang, Song, Si, Yilong, Lu, Shaoyong, Zhou, Hongwei, Liu, Dan, Tian, Xiaoli, Qiu, Hengwei, Yang, Yuchen, Li, Zhengcao, Li, Xiaoyan, Lin, Linhan, Sun, Hong-Bo, Zhang, Hao, Li, Jinghong |
| Source: | Science (pre-March 2025). 9/29/2023, Vol. 381 Issue 6665, p1468-1474. 7p. 5 Diagrams. |
| Subjects: | Three-dimensional printing, Nanostructured materials, Manufacturing processes, Metallic oxides, Laser printing, Nanocrystals, Print materials |
| Abstract: | 3D printing of inorganic materials with nanoscale resolution offers a different materials processing pathway to explore devices with emergent functionalities. However, existing technologies typically involve photocurable resins that reduce material purity and degrade properties. We develop a general strategy for laser direct printing of inorganic nanomaterials, as exemplified by more than 10 semiconductors, metal oxides, metals, and their mixtures. Colloidal nanocrystals are used as building blocks and photochemically bonded through their native ligands. Without resins, this bonding process produces arbitrary three-dimensional (3D) structures with a large inorganic mass fraction (~90%) and high mechanical strength. The printed materials preserve the intrinsic properties of constituent nanocrystals and create structure-dictated functionalities, such as the broadband chiroptical responses with an anisotropic factor of ~0.24 for semiconducting cadmium chalcogenide nanohelical arrays. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | 3D printing of inorganic materials with nanoscale resolution offers a different materials processing pathway to explore devices with emergent functionalities. However, existing technologies typically involve photocurable resins that reduce material purity and degrade properties. We develop a general strategy for laser direct printing of inorganic nanomaterials, as exemplified by more than 10 semiconductors, metal oxides, metals, and their mixtures. Colloidal nanocrystals are used as building blocks and photochemically bonded through their native ligands. Without resins, this bonding process produces arbitrary three-dimensional (3D) structures with a large inorganic mass fraction (~90%) and high mechanical strength. The printed materials preserve the intrinsic properties of constituent nanocrystals and create structure-dictated functionalities, such as the broadband chiroptical responses with an anisotropic factor of ~0.24 for semiconducting cadmium chalcogenide nanohelical arrays. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adg6681 |
