Method of colloid crystal growth on patterned surfaces
AssigneesEugenia Kumacheva, Edward H. Sargent, Robert Kori Golding, Mathieu Allard
InventorsEugenia Kumacheva, Edward H. Sargent, Robert Kori Golding, Mathieu Allard
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Abstract
Method of synthesis of confined colloidal crystals using electrodeposition. The present invention provides a method of growing confined colloidal crystal structures using electrodeposition of monodispersed charged colloid spheres onto a substrate patterned with an array of electroconductive surface relief features on a surface of a substrate. In this approach, control over large-scale ordering is achieved via a planar pattern whose scale is on the order of tens of microns, a regime readily accessed through coarse lithography, laser micromachining, and holography.
Claims31
A method for producing colloidal crystals on patterned surfaces, comprising the steps of:
- a) producing a pre-selected relief pattern of topographical features in a surface of a substrate in which selected topographical features into which colloidal particles are to be deposited include an electrically conductive layer;
- and
- b) electrodepositing colloidal particles of pre-selected size and shape into said selected topographical features on said surface of the substrate.
A product comprising a colloidal crystal confined to a surface of a substrate produced by a method comprising the steps of:
- a) producing a pre-selected relief pattern of topographical features in a surface of a substrate in which selected topographical features into which colloidal particles are to be deposited include an electrically conductive layer;
- and
- b) electrodepositing colloidal particles of pre-selected size and shape into said selected topographical features on said surface of the substrate.
A method for producing colloidal crystals on a surface of a substrate, comprising the steps of:
- a) patterning an electrically conducting surface of a substrate with a pre-selected pattern of relief features;
- and
- b) electrodepositing colloidal particles of pre-selected size and shape into said relief features in said electrically conducting surface.
A product comprising a colloidal crystal confined to a surface of a substrate produced by a method comprising the steps of:
- a) patterning an electrically conducting surface of a substrate with a pre-selected pattern of relief features;
- and
- b) electrodepositing colloidal particles of pre-selected size and shape into said relief pattern in said electrically conducting surface.
A method for producing colloidal crystals on patterned surfaces, comprising the steps of:
- a) modulating in a controllable manner the spatial profile of electrical conductivity of a surface of a substrate so that a selected portion of the surface defining a surface pattern is electrically conductive, and at the same time, modulating in a controllable manner a relief profile of this same surface to produce a surface relief profile including confined surface features having electrically conductive coatings into which colloidal particles can be electrodeposited;
- and
- b) electrodepositing colloidal particles into said electrically coated surface features.
Dependencies are inferred from the claim text.