Biomineralization-inspired copper-cystine nanoleaves capable of laccase-like catalysis for the colorimetric detection of epinephrine

References

ref title DOI material type comment
3868 682 Biomineralization-inspired copper-cystine nanoleaves capable of laccase-like catalysis for the colorimetric detection of epinephrine https://doi.org/10.1007/s11705-020-1940-y Composite Inspired by the pathological biomineralization behaviour of L-cystine, in this study, we constructed a laccase-like catalyst through the co-assembly of L-cystine with Cu ions. Structural analysis revealed that the formed catalytic Cu-cystine nanoleaves (Cu-Cys NLs) possess a Cu(I)-Cu(II) electron transfer system similar to that in natural laccase. Reaction kinetic studies demonstrated that the catalyst follows the typical Michaelis-Menten model.

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
7898 682 Cu-Cys NLs nm TEM The enlarged image shows that the NLs are approximately 16.2 nm thick (Fig. 1(b)), 450 nm long and 300 nm wide (Fig. 1(c)).

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
6576 682 Cu-Cys NLs hydrolase 2,4-DP 6.8 25 0.1 mM 1.44 μM/min 682 kcat/km unit: ×10-3 g -1 min-1 L

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5611 682 Cu-Cys NLs detetion of epinephrine epinephrine Color 9–455 μM/L 2.7 μM/L 100.1-108.3%