3D-printing nanocrystals with light
3D-printing nanocrystals with light
复制标题
用光 3D 打印纳米晶体
DOI：
10.1126/science.add8382
复制
发表时间：
2022
期刊：
影响因子：
56.9
通讯作者：
Talapin, Dmitri V.
中科院分区：
文献类型：
--
作者：
Pan, Jia-Ahn;Talapin, Dmitri V.
按需制造定制三维（3D）物体的能力已经彻底改变了原型设计和小规模制造工艺。从爱好者可以用来更换塑料电池盖的低成本细丝挤出机，到用于金属航天器零件的激光烧结机，3D打印技术在低端和高端市场的覆盖范围不断扩大。这一进展的一个关键部分是可以3D打印的材料库的扩展。纳米晶体具有许多功能特性，但它们与3D打印的集成受到限制，主要依赖于使用聚合物材料作为支架。在本期的第1112页，Liu等人展示了使用双光子光刻法的纳米晶体3D打印。红外飞秒激光的强光束在非常小的体积内诱导两个光子的同时吸收，从而在微球表面引发光化学反应。
The ability to fabricate custom three-dimensional (3D) objects on demand has revolutionized prototyping and small-scale manufacturing processes. From low-cost filament extruders that a hobbyist can use to replace a plastic battery cover, to laser sintering machines for metal spacecraft parts, the reach of 3D printing technologies in low- and high-end markets continues to broaden. A crucial part of this progress has been the expansion of the library of materials that can be 3D-printed. Nanocrystals have many functional properties, but their integration with 3D printing has been limited, mostly relying on the use of polymer material as a scaffolding. On page 1112 of this issue, Liuet al.demonstrate the 3D printing of nanocrystals using a method known as two-photon lithography. The intense beam of an infrared femtosecond laser induces simultaneous absorption of two photons in a very small volume, triggering photochemical reactions at nanocrystal surfaces.