Blue Laser Projection Printing of Conductive Complex 2D and 3D Metallic Structures from Photosensitive Precursors
Blue Laser Projection Printing of Conductive Complex 2D and 3D Metallic Structures from Photosensitive Precursors
复制标题
利用光敏前驱体进行蓝色激光投影打印导电复杂 2D 和 3D 金属结构
DOI：
10.1021/acsami.9b02818
复制
发表时间：
2019
影响因子：
9.5
通讯作者：
Xu Jian
中科院分区：
文献类型：
--
作者：
Wang Xiaolu;Cui Kejian;Xuan Qin;Zhu Caizhen;Zhao Ning;Xu Jian
开发了用于通过蓝色激光投影打印2D和3D导电结构的光敏前驱体。在光敏剂的辅助下，金属纳米粒子在弱光强(45-290 mW·cm-2)的激光照射下可以有效地进行光合作用。通过在前驱体上投射清晰的激光图形，可以在包括柔性聚合物薄膜、曲面衬底和磨玻璃在内的各种衬底上形成对应的2D金属结构，最细线约为50μm。此外，通过3D打印将金属前体的光还原和树脂的光聚合相结合，构建了将纳米颗粒嵌入到聚合物基质中的复杂3D对象。所制备的结构在烧结后表现出良好的导电性(数量级为106sm-1)。提出了蓝光照射下金属纳米颗粒光化学合成的可能机理。该技术的高效率和低成本，所制备的结构的复杂性，以及对各种基板和金属(包括银、金和钯)的适用性，预示着该方法在印刷电子工业中的实际应用。
Photosensitive precursors are developed for the printing of 2D and 3D conductive structures via blue laser projection printing. With the assistance of a photosensitizer, metal nanoparticles can be efficiently photosynthesized under laser irradiation of low light intensity (45–290 mW cm–2). By projecting well-defined laser patterns on the precursor, corresponding 2D metal structures with the finest line of about 50 μm can be formed on various substrates including flexible polymer thin films, curved substrates, and ground glass. Moreover, complex 3D objects with nanoparticles embedded in the polymeric matrix are constructed via 3D printing combining photoreduction of the metal precursor and photopolymerization of resin. The as-prepared structures exhibit promising conductivities after sintering (in the order of magnitude of 106S m–1). A possible mechanism of photochemical synthesis of metal nanoparticles upon exposure to blue laser is proposed. The high efficiency and low cost of the technique, the complexity of the structures prepared, and the applicability to various substrates and metals (including silver, gold, and palladium) promise practical applications of this approach in the printed electronics industry.