Different from the mainstream anti-counterfeiting strategy with external stimuli induced fluorescence color changes, a highly concealed mechanism is proposed, where external stimuli do not alter fluorescence color but cause significant spectral changes. Dual-emission red carbon dots with response to Al3+ was demonstrated as a proof of the principle.
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J. Chen, K. Wu, M. Xi, J. Cai, R. Chen, Y. Shen, S. Liu and Y. Zhang, Anal. Methods, 2026, Accepted Manuscript , DOI: 10.1039/D6AY00700G
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