Fluorescent ink compositions comprising functionalized fluorescent nanocrystals
AssigneeBioCrystal, Ltd.
InventorEmilio Barbera-Guillem
Life of this patent
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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
Claims32
A fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier comprising water or a water-based solution, a surfactant and a binder.
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 operably bound to the functionalized fluorescent nanocrystals in forming a cross-linked fluorescent ink composition.
A method for identifying an object comprising the steps of:
- exposing a fluorescent ink composition comprising functionalized fluorescent nanocrystals, an aqueous-based ink carrier, and a binder to an excitation light source having a wavelength spectrum in a range of from about 300 nm to about 400 nm;
- detecting a peak fluorescent emission in a spectral range of from about 410 nm to about 750 nm;
- and
- identifying an object in response to the detecting.
A fluorescent ink composition comprising:
- functionalized fluorescent doped metal oxide nanocrystals;
- an aqueous-based ink carrier;
- and
- a binder.
Dependencies are inferred from the claim text.