Synergistic in-situ growth of silver nanoparticles with nanozyme activity for dual-mode biosensing and cancer theranostics

References

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1342Synergistic in-situ growth of silver nanoparticles with nanozyme activity for dual-mode biosensing and cancer theranosticshttps://doi.org/10.1016/j.cclet.2020.09.013CompositeAgNPs@GQDs is prepared by synergistic in-situ growth of silver nanoparticles (AgNPs) on the complex of tannic acid (TA) and graphene quantum dots (GQDs)

Materials

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BET
b nanozyme
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1342AgNPs@GQDs14-24nmTEMIn comparison, AgNPs without the assembly of GQDs show the morphology with a little aggregation (Fig. S1 in Supporting information), which are smaller than that of AgNPs@GQDs (14−24 nm). Upon treating with H2O2, the characteristic nanoparticles of AgNPs@GQDs disappear, and the monodisperse nanodots with the average diameter of 6.7 nm are observed in TEM image25.3479
1342GQDs6.4nmTEMTransmission electron microscopy (TEM) images of GQDs demonstrate a good monodispersity with the average diameter of 6.4 nm in lateral size (Fig. 1B).

Kinetics

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T
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1342GQDsPODTMB1.84mM0.0117ΔAbs/s13421342

Applications

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1342AgNPs@GQDsdetection of glucoseglucoseFluor5-100μM1.31μM
1342AgNPs@GQDsdetection of glucoseglucoseColor0.5-50μM0.17μM92.89%–104.44%
1342AgNPs@GQDsdetection of H2O2H2O2Fluor2-60μM0.83μM
1342AgNPs@GQDsdetection of H2O2H2O2Color0.08-40μM0.025μM