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ACTUATION VIA SURFACE CHEMISTRY INDUCED SURFACE STRESS

United States Patent Application

20090101241
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A method of controlling macroscopic strain of a porous structure includes contacting a porous structure with a modifying agent which chemically adsorbs to a surface of the porous structure and modifies an existing surface stress of the porous structure. A device in one embodiment includes a porous metal structure, which when contacted with a modifying agent which chemically adsorbs to a surface of the porous metal structure, exhibits a volumetric change due to modification of an existing surface stress of the porous metal structure; and a mechanism for detecting the volumetric change. Additional methods and systems are also presented.
Biener, Juergen (San Leandro, CA), Biener, Monika M. (San Leandro, CA), Hamza, Alex V. (Livermore, CA), Baeumer, Marcus (Bremen, DE), Wittstock, Arne (Bremen, DE), Weissmueller, Joerg (Stutensee, DE), Kramer, Dominik (Eggenstein-Leopoldshafen, DE), Viswanath, Raghavan Nadar (Eggenstein-Leopoldshafen, DE)
12/ 249,630
October 10, 2008
[0002] The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.