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Reversible Actuation of Microstructures by Surface‐Chemical Modification of Thin‐Film Bilayers
Author(s) -
Randhawa Jatinder S.,
Keung Michael D.,
Tyagi Pawan,
Gracias David H.
Publication year - 2010
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200902337
Subject(s) - microstructure , materials science , surface modification , closing (real estate) , nanotechnology , thin film , coupling (piping) , chemical engineering , composite material , political science , law , engineering
Reversible curving of chromium/copper bilayers on exposure to oxidative and reductive environments is described. Bilayers are lithographically patterned as hinges within larger microstructures to enable reversible opening and closing, without the need for any tethers or batteries (see image). Demonstrations suggest a new strategy for coupling chemical reactions and surface modification to mechanical motion to enable autonomous, chemically responsive microstructures.