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Guided Assembly of Block Copolymers in Three-Dimensional Woodpile Scaffolds

Choi, Jaewon; Koo, Sangmo; Sakellari, Ioanna; Kim, Hyeyoung; Su, Zhengliang; Carter, Kenneth R.; Farsari, Maria; Grigoropoulos, Costas P.; Russell, Thomas P.

By 12 March 2019No Comments

ACS Applied Materials & Interfaces, 2018, vol 10, 49, pp. 42933-42940



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.

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