FLUORESCENT INK COMPOSITIONS COMPRISING FUNCTIONALIZED FLUORESCENT NANOCRYSTALS
First Claim
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20. A method of providing an image on a substrate for subsequent identification comprising applying onto the substrate a fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier comprising water or a water-based solution, and a binder.
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Abstract
A fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier comprising water or a water-based solution, and a binder. Also provided are methods of providing an image or a security mark on a substrate for subsequent identification by applying a fluorescent ink composition onto the substrate.
50 Citations
36 Claims
- 20. A method of providing an image on a substrate for subsequent identification comprising applying onto the substrate a fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier comprising water or a water-based solution, and a binder.
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30-1. A substrate having printed thereon an image according to claim 27.
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31-2. A substrate having printed thereon an image according to claim 28.
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33. A method for identifying an object comprising the steps of:
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(a) applying a security mark to the object using a fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier comprising water or a water-based solution, and a binder; (b) exposing the object to an excitation light source having a wavelength spectrum in a range of from about 300 nm to about 400 nm; (c) visualizing the security mark by detecting a peak fluorescent emission in a spectral range of from about 410 nm to about 750 nm; and (d) identifying the object in response to visualizing the security mark. - View Dependent Claims (34, 35, 36)
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Specification