Lawrence Livermore National Security, LLC

Abhinav Parakh

Johanna Jesse Schwartz

Martin Patrick De Beer

Sijia Huang

Magi Yassa

Elena Romane Lilith Belk

Xiaoxing Xia

In one general embodiment, a method includes, during performance of an additive manufacturing process that includes photocuring of a resin, monitoring light output generated by a fluorophore in the resin that exhibits aggregation-induced emission (AIE) behavior. An indication of an extent of photocuring is output based on the monitored light output. In another general embodiment, a resin for additive manufacturing includes molecules configured for photopolymerization and/or photocuring, the molecules being selected from the group consisting of monomers, oligomers, and polymers; a photoinitiator; and a fluorophore that exhibits aggregation-induced emission (AIE) behavior. The fluorophore is present in an amount of at least 0.00005 wt % relative to a total weight of the resin. In yet another general embodiment, a three-dimensional encrypted structure includes a fluorophore that exhibits aggregation-induced emission (AIE) behavior. The structure has information encoded therein via the fluorophore, the information being viewable by illuminating the fluorophore with fluorescent light.

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Livermore, CA, United States of America

Abhinav Parakh