Choi Jaewon, Koo Sangmo, Sakellari Ioanna, Kim Hyeyoung, Su Zhengliang, Carter Kenneth R, Farsari Maria, Grigoropoulos Costas P, Russell Thomas P
Polymer Science and Engineering Department , University of Massachusetts Amherst , 120 Governors Drive , Amherst , Massachusetts 01003 , United States.
Laser Thermal Lab, Department of Mechanical Engineering , University of California Berkeley , Berkeley , California 94720 , United States.
ACS Appl Mater Interfaces. 2018 Dec 12;10(49):42933-42940. doi: 10.1021/acsami.8b17172. Epub 2018 Nov 30.
Three-dimensional (3D) nanofabrication using the directed self-assembly of block copolymers (BCPs) holds great promise for the nanoscale device fabrication and integration into 3D architectures over large areas with high element densities. In this work, a robust platform is developed for building 3D BCP architectures with tailored functionality using 3D micron-scale woodpile structures (WPSs), fabricated by a multiphoton polymerization technique. By completely filling the spaces of the WPSs and using the interactions of the blocks of the BCPs with the struts of the WPS, well-developed 3D nanoscopic morphologies are produced. Metal ion complexation with one block of the copolymer affords a convenient stain to highlight one of the microdomains of the copolymer for electron microscopy studies but also, with the reduction of the complexing salt to the corresponding metal, a simple strategy is shown to produce 3D constructs with nanoscopic domain resolution.
利用嵌段共聚物（BCP）的定向自组装进行三维（3D）纳米制造，对于纳米级器件制造以及在大面积上以高元件密度集成到3D架构中具有巨大潜力。在这项工作中，开发了一个强大的平台，用于使用通过多光子聚合技术制造的3D微米级木堆结构（WPS）构建具有定制功能的3D BCP架构。通过完全填充WPS的空间，并利用BCP的嵌段与WPS支柱之间的相互作用，产生了发育良好的3D纳米形态。金属离子与共聚物的一个嵌段络合，不仅为电子显微镜研究提供了一种方便的染色方法，以突出共聚物的一个微区，而且通过将络合盐还原为相应的金属，展示了一种产生具有纳米级域分辨率的3D结构的简单策略。
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