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Photoluminescent gold nanoclusters as two-photon excited ratiometric pH sensor and photoactivated peroxidase
A two-photon excited ratiometric fluorescent pH sensor is reported by combining l-cysteine–protected AuNCs (Cys@AuNCs) with fluorescein isothiocyanate (FITC). Cys@AuNCs were synthesized through a one-step self-re...