Viscoelastic lithography for fabricating self-organizing soft micro-honeycomb structures with ultra-high aspect ratios

Gi Seok Jeong, Da Yoon No, JaeSeo Lee, Junghyo Yoon, Seok Chung and Sang-Hoon Lee ()
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Gi Seok Jeong: College of Health Science, Korea University
Da Yoon No: College of Health Science, Korea University
JaeSeo Lee: KU-KIST Graduate School of Converging Science and Technology, Korea University
Junghyo Yoon: School of Mechanical Engineering, Korea University
Seok Chung: School of Mechanical Engineering, Korea University
Sang-Hoon Lee: College of Health Science, Korea University

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract High-aspect ratio micro- and nano-structures have been used for the production of a variety of applications. In this paper, we describe a simple and cost-effective approach to fabricate an arrayed microarchitecture with an ultra-high aspect ratio using soft materials. The shapes and sizes of the honeycomb structure can be easily modulated by changing the dimensions and position of the base mould pattern and the pressure. The honeycomb structure is used to prepare a drug delivery patch and a microwell array to form cell spheroids without cell loss. The honeycomb structures prepared using natural ECM (collagen–Matrigel) materials are successfully fabricated. The hepatocytes and endothelial cells are seeded and co-cultured in the ECM-based micro-honeycomb to prepare a 3D liver model successfully mimicking an ultrastructure of liver and providing enhanced liver function.

Date: 2016
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DOI: 10.1038/ncomms11269

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