SiO2@Pt NPs

Materials

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BET
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1068SiO2@Pt NPsTEMthe silica seed nanoparticles exhibited excellent dispersity with a mean size of 53 ± 1.5 nm, and with the further growth of silica on the surface of seed nanoparticles, the resulting SiO2 nanoparticles reached a size of approximately 114 ± 3.4 nm (Fig. 1b). TEM illustrated that the mean size of the as-prepared Pt NPs was 3.0 ± 0.3 nm (Fig. S1). HRTEM showed that the lattice spacing of the Pt NPs was 0.23 nm (inset in Fig. S1), which corresponds to the (111) lattice facet of Pt crystals [37].

Kinetics

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1068SiO2@Pt NPsPODTMB0.2193mM283.5nM/s10681068
1068SiO2@Pt NPsPODTMB0.09804mM355.0nM/s10681068
1068SiO2@Pt NPsPODTMB0.1292mM308.7nM/s10681068
1068SiO2@Pt NPsPODTMB0.3153mM40.92nM/s10681068

Applications

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1068SiO2@Pt NPsdetection of mercury ionsHg2+Color0.005-5000nM60fM

References

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DOI
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1068Silica-based nanoenzymes for rapid and ultrasensitive detection of mercury ionshttps://doi.org/10.1016/j.snb.2020.129304Compositeoaded Pt NPs on the surface of silica nanoparticles (SiO2@Pt NPs)