Actuation via surface chemistry induced surface stress
AssigneeLawrence Livermore National Security, LLC
InventorsJuergen Biener, Monika M. Biener, Alex V. Hamza, Marcus Baeumer, Arne Wittstock, Joerg Weissmueller, Dominik Kramer, Raghavan Nadar Viswanath
Life of this patent
Estimating the term…
Abstract
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. Additional methods and systems are also presented.
Claims19
A method of controlling macroscopic strain of a porous structure, the method comprising:
- 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;
- and
- wherein the porous structure has a ratio of surface atoms to bulk atoms of at least about 1×10−3.
A method of controlling macroscopic strain of a porous metal structure, the method comprising:
- contacting a porous metal structure with a removing agent for removing a chemically adsorbed modifying agent from the porous metal structure, thereby causing a recovery of about dimensions of the porous metal structure prior to adsorption of the modifying agent;
- and
- wherein the porous metal structure has a ratio of surface atoms to bulk atoms of at least about 1×10−3.
A method of controlling macroscopic strain of a porous metal structure, the method comprising:
- contacting a porous metal structure with a removing agent for removing a chemically adsorbed modifying agent from the porous metal structure, thereby causing a recovery of about dimensions of the porous metal structure prior to adsorption of the modifying agent;
- and
- wherein a media pore size of the porous metal structure is less than about 100 nm.
A method of controlling macroscopic strain of a porous metal structure, the method comprising:
- contacting a porous metal structure with a modifying agent which chemically adsorbs to a surface of the porous metal structure and modifies an existing surface stress of the porous metal structure, thereby causing an at least partially reversible volumetric change of the nanoporous metal structure;
- and
- contacting the porous metal structure with a removing agent for removing a chemically adsorbed modifying agent from the porous metal structure, thereby causing an at least partial recovery of about dimensions of the porous metal structure prior to adsorption of the modifying agent;
- and
- wherein the porous metal structure has a ratio of surface atoms to bulk atoms of at least about 1×10−3.
A method of controlling macroscopic strain of a porous metal structure, the method comprising:
- contacting a porous metal structure with a modifying agent which chemically adsorbs to a surface of the porous metal structure and modifies an existing surface stress of the porous metal structure, thereby causing an at least partially reversible volumetric change of the nanoporous metal structure;
- and
- contacting the porous metal structure with a removing agent for removing a chemically adsorbed modifying agent from the porous metal structure, thereby causing an at least partial recovery of about dimensions of the porous metal structure prior to adsorption of the modifying agent;
- and
- wherein a media pore size of the porous metal structure is less than about 100 nm.
Dependencies are inferred from the claim text.