Size Effect in Pd− Ir Core‐Shell Nanoparticles as Nanozymes

References

ref title DOI material type comment
3558 366 Size Effect in Pd− Ir Core‐Shell Nanoparticles as Nanozymes https://doi.org/10.1002/cbic.202000147 Metal Pd−Ir core-shell nanoparticles

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
7605 366 Pd−Ir core-shell nanoparticles 3.3–13.0 nm TEM Pd−Ir nanoparticles with four different sizes (3.3, 5.9, 9.8 and 13.0 nm), but identical shapes and surface structures, were designed and synthesized. atalytic activity of individual Pd−Ir NPs increases as particle size increases. Area-specific catalytic activity is similar for Pd−Ir NPs of 3.3–9.8 nm, but is slightly decreased when particle size reached to 13.0 nm.

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
6247 366 Pd−Ir core-shell nanoparticles(3.3 nm) POD TMB 2.7 -4 M 6.3 -7 M/s 9.4 4 1/s 366
6246 366 Pd−Ir core-shell nanoparticles(9.8 nm) POD TMB 4 -4 M 8.9 -6 M/s 9.6 5 1/s 366
6245 366 Pd−Ir core-shell nanoparticles(13.0 nm) POD TMB 3.4 -4 M 7.2 -7 M/s 1.2 6 1/s 366
6244 366 Pd−Ir core-shell nanoparticles(5.9 nm) POD TMB 6.4 -4 M 1.3 -7 M/s 3.4 5 1/s 366

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5272 366 Pd−Ir core-shell nanoparticles This work not only demonstrates the size effect, but also provides an effective strategy to enhance the performance of nanozymes in certain applications. 10- 2000 pg/mL 8.2, 4.6, and 3.7 pg/mL the limit of detection (LOD, which was defined by the 3SD method33) for the ELISAs were lowered from 9.3, to 8.2, 4.6, and 3.7 pg/mL when the size of Pd−Ir NPs was reduced from 13.0 to 9.8, 5.9, and 3.3 nm, respectively.
5271 366 Pd−Ir core-shell nanoparticles This work not only demonstrates the size effect, but also provides an effective strategy to enhance the performance of nanozymes in certain applications. 10- 2000 pg/mL 8.2, 4.6, and 3.7 pg/mL