Silver nanoplate compositions and methods
AssigneenanoComposix, Inc.
InventorsSteven J. Oldenburg, Martin Miranda, David S. Sebba
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Abstract
Embodiments of the present invention relate to methods for preparing high optical density solutions of nanoplates, such as silver nanoplates or silver platelet nanoparticles, and to nanoparticles, solutions and substrates prepared by said methods. The process can include the addition of stabilizing agents (e.g., chemical or biological agents bound or otherwise linked to the nanoparticle surface) that stabilize the nanoparticle before, during, and/or after concentration, thereby allowing for the production of a stable, high optical density solution of silver nanoplates. The process can also include increasing the concentration of silver nanoplates within the solution, and thus increasing the solution optical density.
Claims20
A process for increasing an optical density of a solution of stable, silver nanoplates to preserve shape post-concentration, comprising:
- providing a solution comprising silver nanoplates having a plate shape, an extinction spectra, and a first peak optical density between 0.1-10 cm−1;
- adding a concentration stabilizing chemical agent to the solution of silver nanoplates;
- adding borate to the solution of silver nanoplates;
- and
- increasing the concentration of silver nanoplates in the solution to generate a concentrated solution using tangential flow filtration, thereby increasing the optical density of the concentrated solution to a second peak optical density greater than 10 cm−1,
- wherein the silver nanoplates in the concentrated solution retain the plate shape and the extinction spectra at the second peak optical density greater than 10 cm−1.
A process for increasing an optical density of a solution of stable silver nanoplates to preserve shape post-concentration, comprising:
- providing a solution comprising silver nanoplates having a plate shape,
- wherein the solution has an extinction spectra and a first peak optical density between 0.1-10 cm−1;
- adding a polyvinyl containing polymer and borate to the solution;
- and
- increasing the concentration of silver nanoplates in the solution to generate a concentrated solution, thereby increasing the optical density of the concentrated solution to a second peak optical density greater than 10 cm−1,
- wherein the silver nanoplates in the concentrated solution retain the plate shape and the extinction spectra at the second peak optical density greater than 10 cm−1.
Dependencies are inferred from the claim text.