An efficient scheme that realizes broad tunability of photon upconversion in core–shell nanoparticles may lead to applications in biosensing, security labelling and more.
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Kotov, N. The only way is up. Nature Mater 10, 903–904 (2011). https://doi.org/10.1038/nmat3181
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DOI: https://doi.org/10.1038/nmat3181
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