Rot becomes blue - Leibniz Institute for Photonic Technologies e.V.

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A drop of liquid, a beam of light – and suddenly an invisible signal becomes visible. A research team from Leibniz-IPHT and the University of Leiden has developed a molecular sensor that could in future capture deep in the tissue processes that have so far been in the dark. The basis is the triplet triplet annihilation upconversion (TTA-UC), an optical mechanism in which two partner molecules absorb red light, transfer energy to a fluorescent mo…