Synthetic vesicles with membranes made from amphiphiles that are fluorescence acceptors encapsulate donor molecules in their cores, and emit different proportions of red, blue and green light depending on pH. The balance of these coloured emissions at pH 9 results in white fluorescence.
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Sakai, N., Matile, S. Vesicles head in white direction. Nature Chem 1, 599–600 (2009). https://doi.org/10.1038/nchem.428
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DOI: https://doi.org/10.1038/nchem.428
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