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US 2010/0143677 A1Published application
Wrinkle-free nanomechanical film
AssigneeBoard of Trustees of Michigan State University
InventorsIlsoon Lee, Troy R. Hendricks
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AssigneeBoard of Trustees of Michigan State University
InventorsIlsoon Lee, Troy R. Hendricks
Estimating the term…
Methods to control and prevent polymer films from buckling are provided. Buckled morphologies are created by thermally cycling or mechanically compressing a substrate such as poly(dimethylsiloxane) (PDMS) coated with a polyelectrolyte multilayer film. By varying the dimensions of the surface topography relative to the buckling wavelength (e.g., pattern size is less than, equal to, and greater than the buckling wavelength) the orientation and the local morphology of the buckled films is controlled. Based on the information obtained, we demonstrate how to alleviate the unavoidable buckling by incorporating nanoparticles into the film. In addition, we studied the effect of the silica layer that results from oxygen plasma treatment and the critical temperature for permanent film buckling.
A non-buckling self-standing multilayer thin film comprising a plurality of alternating layers of polycation and polyanion, and nanoparticles distributed throughout the film among the layers.
A method of making a non-buckling multilayer thin film by building up layers and exposing built-up layers to at least two suspensions or solutions with nanoparticles, the film comprising nanoparticles in a polyelectrolyte multilayer film, the method comprising
A composite comprising a substrate and an adhered polyelectrolyte multilayer film, wherein the multilayer film further comprises nanoparticles among the layers, and wherein the film and substrate have different coefficients of thermal expansion, but the film does not buckle when the substrate and film are subjected to a thermal treatment.
A method of making a non-buckling multilayer thin film by building up bilayers, the film comprising nanoparticles in a polyelectrolyte multilayer film, the method comprising applying alternating layers of polyelectrolyte and charged nanoparticles to build up one or more bilayers first layer applied to the substrate is a polyelectrolyte with a charge opposite to the charge of the substrate surface.
A method of skin treatment, comprising applying to the skin a topical film comprising a non-buckling PEM thin film comprising nanoparticles among the layers of the PEM film.
A method of treating or preventing wrinkles in skin, comprising applying to the skin a non-buckling PEM thin film comprising nanoparticles among the layers of the PEM film.
Dependencies are inferred from the claim text.