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Silica-based nanoenzymes for rapid and ultrasensitive detection of mercury ions

References

ref title DOI material type comment
4255 1068 Silica-based nanoenzymes for rapid and ultrasensitive detection of mercury ions https://doi.org/10.1016/j.snb.2020.129304 Composite oaded Pt NPs on the surface of silica nanoparticles (SiO2@Pt NPs)

Materials

ref material size size err size unit size type size comment BET b nanozyme b 10n b unit specific act sa 10n sa unit comment
8135 1068 SiO2@Pt NPs TEM the 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

ref material enzyme type substrate pH T km km err km 10n km unit vmax vmax err vmax 10n vmax unit kcat kcat err kcat 10n kcat unit kcat/km kcat/km 10n kcat/km unit comment
7032 1068 SiO2@Pt NPs POD TMB 0.3153 mM 40.92 nM/s 1068 1068
7031 1068 SiO2@Pt NPs POD TMB 0.1292 mM 308.7 nM/s 1068 1068
7030 1068 SiO2@Pt NPs POD TMB 0.09804 mM 355.0 nM/s 1068 1068
7029 1068 SiO2@Pt NPs POD TMB 0.2193 mM 283.5 nM/s 1068 1068

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5981 1068 SiO2@Pt NPs detection of mercury ions Hg2+ Color 0.005-5000 nM 60 fM


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