A smartphone camera, patterned with arrays of filters made from colloidal suspensions of coloured particles, has been transformed into a powerful tool for spectral analysis. See Letter p.67
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Anheier, N. Colourful particles for spectrometry. Nature 523, 39–40 (2015). https://doi.org/10.1038/523039a
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DOI: https://doi.org/10.1038/523039a
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