期刊
SOFT MATTER
卷 12, 期 22, 页码 4985-4990出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm00714g
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资金
- CooperVision, Inc. through a Science & Technology Award
- US Army Research Office [W911NF-11-1-0080]
- National Science foundation [DMR-1507377]
- Kavli Institute of Theoretical Physics in Santa Barbara, CA
Shape programmable materials capable of morphing from a flat sheet into controlled three dimensional (3D) shapes offer promise in diverse areas including soft robotics, tunable optics, and bio-engineering. We describe a simple method of 'grayscale gel lithography' that relies on a digital micromirror array device (DMD) to control the dose of ultraviolet (UV) light, and therefore the extent of swelling of a photocrosslinkable poly(N-isopropyl acrylamide) (PNIPAm) copolymer film, with micrometer-scale spatial resolution. This approach allows for effectively smooth profiles of swelling to be prescribed, enabling the preparation of buckled 3D shapes with programmed Gaussian curvature.
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