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Biomimetic Nanostructured Surfaces with Designer Mechanics and Geometry for Broad Applications

Published online by Cambridge University Press:  31 January 2011

Alexander K Epstein  and
Joanna Aizenberg
Alexander K Epstein
Affiliation:
alexepstein@gmail.com, Harvard University, School of Engineering and Applied Sciences, Cambridge, Massachusetts, United States
Joanna Aizenberg
Affiliation:
jaiz@seas.harvard.edu, Harvard University, School of Engineering and Applied Sciences, Cambridge, Massachusetts, United States
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Abstract

A powerful fabrication platform for a wide range of biomimetic, high-aspect-ratio nanostructured surfaces is introduced. The principles of soft lithography are extended into a double-mold replication process, whereby a master topography is mapped onto an elastomeric inverse mold and replicated in arbitrary multiple material and stiffness gradients, and an array of modified geometries. Control of geometry via deformation of the inverse mold and control of stiffness via prepolymer mixing are discussed. New capabilities enabled by our approach include biomimetic actuation/sensor arrays with programmable biases, precisely tunable mechanical and geometric properties for optical or wetting applications, and flexible curved substrates. Indeed, flexibly anchored ciliary high-aspect-ratio nanostructures are now possible, and a proof-of-principle is described.

Keywords

nanostructureactuatorbiomimetic (assembly)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1236: Symposium SS – Biosurfaces and Biointerfaces , 2009 , 1236-SS09-07
Copyright
Copyright © Materials Research Society 2010

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