Stable Silver Colloids and Silica-Coated Silver Colloids, and Methods of Preparing Stable Silver Colloids and Silica-Coated Silver Colloids
First Claim
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1. A method of preparing a silver colloid, comprising:
- heating a silver-containing solution;
combining the heated silver-containing solution with an acid solution; and
cooling the combined solutions to form a silver colloid comprising silver particles.
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Abstract
Methods for preparing silver colloids and silica-coated silver colloids are disclosed. The silver colloids may be prepared by heating a silver-containing solution, combining the heated silver-containing solution with an acid solution, and cooling the combined solutions to form a silver colloid containing silver particles. The silver particles in the silver colloid can further be coated with silica. A method for preparing antimicrobial coatings is also disclosed.
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Citations
20 Claims
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1. A method of preparing a silver colloid, comprising:
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heating a silver-containing solution; combining the heated silver-containing solution with an acid solution; and cooling the combined solutions to form a silver colloid comprising silver particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of preparing a silica-coated silver colloid, comprising:
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heating a silver-containing solution; combining the heated silver-containing solution with an acid solution; cooling the combined solutions to form a silver colloid comprising silver particles; adding aqueous ammonia and ethanol to the silver colloid; and adding tetraethoxysilane to the silver colloid to form a silica-coated silver colloid comprising silica-coated silver particles. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of forming an antimicrobial coating, comprising:
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providing a substrate; preparing a silver colloid by heating a silver-containing solution, combining the heated silver-containing solution with an acid solution; and
cooling the combined solutions to form a silver colloid comprising silver particles,coating the substrate with the silver colloid; and drying the coated substrate. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification