Silk-on-silk layer-by-layer microcapsules.

Adv Mater

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

Published: October 2011

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http://dx.doi.org/10.1002/adma.201102234DOI Listing

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We have demonstrated the facile formation of reversible and fast self-rolling biopolymer microstructures from sandwiched active-passive, silk-on-silk materials. Both experimental and modeling results confirmed that the shape of individual sheets effectively controls biaxial stresses within these sheets, which can self-roll into distinct 3D structures including microscopic rings, tubules, and helical tubules. This is a unique example of tailoring self-rolled 3D geometries through shape design without changing the inner morphology of active bimorph biomaterials.

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