Fluorescent compositions
| DWPI Title: Fluorescent composition used for e.g. tamper-indicating enclosures, comprises microspheres encapsulating fluorescent sensor compound and/or organic reporter molecules, where microspheres are distributed in liquid organic matrix |
| Abstract: A fluorescent composition includes at least one of a fluorescent sensor compound and organic reporter molecules encapsulated in a microsphere structure. When encapsulated, the fluorescent sensor compound and the organic reporter molecules are distributed in a liquid organic matrix. When non-encapsulated, the remaining one of the fluorescent sensor compound and the organic reporter molecules reside in the matrix. In response to a force applied to the composition sufficient to break at least a portion of the microsphere structure, the fluorescent sensor compound and the organic reporter molecules are transformed into a non-reversible fluorescent state exhibiting a quantum yield greater than 0.2. The fluorescent state is objectively visually verifiable without physically contacting the composition. |
| Use: The fluorescent composition is useful for tamper-indicating enclosures (cabinets or equipment enclosures), spray-coating of walls or structures containing or at least partially surrounding an asset, spray-coatings of assets, such as circuit boards, and three-dimensional printed or molded seal bodies. |
| Advantage: The fluorescent composition provides conformal/flexible, scalable, and cost-effective tamper-indicating enclosures with obvious and robust responses to tamper attempts, and the tamper-indicating barrier or seal is applied over the surface of an asset. |
| Novelty: Fluorescent composition comprises microspheres encapsulating at least one component chosen from a fluorescent sensor compound and organic reporter molecules, where the microspheres are distributed in a liquid organic matrix, and when either the fluorescent sensor compound or the organic reporter molecules component is non-encapsulated, the non-encapsulated component resides in the liquid organic matrix, and in response to a force applied to the composition sufficient to break at least a portion of the microspheres, the fluorescent sensor compound and the organic reporter molecules are transformed into a non-reversible fluorescent state exhibiting a quantum yield greater than 0.2. The fluorescent state is verifiable without physically contacting the composition. The fluorescent state is achieved as a result of a turn-on fluorescence response accomplished with the fluorescent sensor mixing or in mass transport with the organic reporter molecules contained in the liquid organic matrix. |
| Filed: 2/19/2018 |
| Application Number: US15898906A |
| Tech ID: SD 13573.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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