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Sulfur vacancy promoted peroxidase-like activity of magnetic greigite (Fe3S4) for colorimetric detection of serum glucose

References

ref title DOI material type comment
3856 670 Sulfur vacancy promoted peroxidase-like activity of magnetic greigite (Fe3S4) for colorimetric detection of serum glucose https://doi.org/10.1016/j.aca.2020.06.056 Sulfide Herein, sulfur vacancies in magnetic greigite (SVs-Fe3S4) nanosheets were synthesized by a one-step solvothermal method by adjusting the ethylene glycol: water ratio.

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
7887 670 Fe3S4 nm SEM SEM was employed to investigate the effects of EG: H2O ratios on the size and shape of Fe3S4 products. All samples exhibited flower-like structure consisting of multiple nanosheets (Fig. S1). However, the “flower” size decreased from ∼10 to ∼4 μm with increasing EG concentrations from 0 to 100%, which may be ascribed to differences in the dielectric constant, interionic attraction and solute-solvent interactions on crystal growth formation [33].

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
6564 670 FS-0 POD H2O2 1.006 mM 5.69 8 M/s 670
6563 670 FS-0 POD TMB 0.175 mM 5.88 8 M/s 670
6562 670 FS-25 POD H2O2 0.814 mM 5.98 8 M/s 670
6561 670 FS-25 POD TMB 0.67 mM 8.77 8 M/s 670
6560 670 FS-50 POD H2O2 0.505 mM 7.89 8 M/s 670
6559 670 FS-50 POD TMB 0.201 mM 11.33 8 M/s 670
6558 670 FS-100 POD H2O2 0.111 mM 13.12 8 M/s 670
6557 670 FS-100 POD TMB 0.161 mM 14.71 8 M/s 670

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5600 670 Fe3S4 detection of glucose glucose Color 0.5-150 μM 0.1 μM 93.7-101.4%


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