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Au@Pt

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
7452 159 Au@Pt 50 nm TEM A typical TEM image (Fig. 3) showed that the Au@Pt nanozymes were relatively uniform in size and similar in structure, and the diameter of the nanoparticles was approximately 50 nm. As a uniform porous structure, Pt NPs formed a branched structure on the surface ofAu. The particle size ofthe Au corewas approximately 30e35 nm, and the average diameter of the Pt NPs was approximately 5e10 nm.
7843 621 Au@Pt TEM From the results of TEM and UV–visible spectroscopy characterizations (Fig. 2), lots of spiny Pt nanostructures can be found on the smooth surface of AuNRs (D = 21 nm and L = 74 nm)
7944 735 Au@Pt TEM The average length and width of the AuNRs were calculated to be 43.3 4.9 nm and 11.2 2.3 nm respectively (Fig. S1a and b, ESI†). The Pt nanodots were wrapped on the surface of the AuNRs homogeneously and formed a rough shell, as observed from Fig. 1b and c and Fig. S2b–d (ESI†). The average length and width were 57.9 4.9 nm and 14.5 2.6 nm respectively (Fig. S1c and d, ESI†). The HR-TEM image of Au@Pt nanorods (Fig. 1d) showed clear lattice distances of 0.224 nm and 0.231 nm, which can be assigned to the (111) planes of crystalline Pt and Au.
7963 752 Au@Pt nm DLS The formation of the spiky Pt layer on GNP seeds resulted in the increase of the hydrodynamic diameter from 22.2 ± 5.2 to 54.9 ± 12.2 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
5930 39 Au@Pt CAT H2O2 509.9 mM 72.5 μM/min 362.3 1/min 39 39
6041 159 Au@Pt POD H2O2 4.076 -3 mM 6.013 -8 M/s 2.004 3 1/s 159 The apparent Km values for Au@Pt nanozyme were about 80e600 times smaller than that ofHRP, which indicated that the affinity between TMB/H2O2 and Au@Pt nanozyme was stronger than that between HRP and TMB/H2O2. Moreover, the Kcat values for Au@Pt nanozyme were about 80e340 times higher than that of HRP, which indicated that the catalytic efficiency of Au@Pt nanozyme was stronger than that of HRP
6043 159 Au@Pt POD TMB 2.431 -3 mM 4.425 -8 M/s 1.475 3 1/s 159
6506 621 Au@Pt POD 621 621
6662 752 Au@Pt POD H2O2 5.75 mM 1.28 -6 M/s 752

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5064 159 Au@Pt Au@Pt nanozymes were introduced to develop a low-cost, rapid, visual and highly sensitive immunochromatographic assay for streptomycin detection streptomycin Color 0.06 ng/ml
5065 159 Au@Pt Au@Pt nanozymes were introduced to develop a low-cost, rapid, visual and highly sensitive immunochromatographic assay for streptomycin detection streptomycin Color 0.06 ng/ml The qualitative LOD was 0.1 ng mL−1 by the naked eye, and the quantitative LOD was 0.06 ng mL−1.
5557 621 Au@Pt Ag+ detection by LSPR spectroscopy Ag+ Color 0.5-1000 μM 500 nM
5658 735 Au@Pt highly sensitive sensing of matrix metalloproteinase 2 MMP-2 E-chem 0.5–100 ng/mL 0.18 ng/mL 96.1 to 104.4%
5678 752 Au@Pt The developed approach was used for reaching a lower limit of detection (LOD) and eliminating the background for the lateral flow immunoassay (LFIA) of the important plant pathogen potato virus X (PVX) in leaf and tuber extracts. 31 pg/ml

References

ref title DOI material type comment
3390 159 Using bimetallic Au@ Pt nanozymes as a visual tag and as an enzyme mimic in enhanced sensitive lateral-flow immunoassays: Application for the detection of streptomycin https://doi.org/10.1016/j.aca.2020.06.009 Multi-metal Au@Pt
3921 735 AH 2 O 2-free electrochemical peptide biosensor based on Au@ Pt bimetallic nanorods for highly sensitive sensing of matrix metalloproteinase 2 https://doi.org/10.1039/D0CC01598A Multi-metal Au@Pt bimetallic nanozyme
3807 621 Peroxidase-like Au@ Pt nanozyme as an integrated nanosensor for Ag+ detection by LSPR spectroscopy https://doi.org/10.1016/j.talanta.2020.121627 Multi-metal Au@Pt nanozyme
3938 752 The steadfast Au@ Pt soldier: Peroxide-tolerant nanozyme for signal enhancement in lateral flow immunoassay of peroxidase-containing samples https://doi.org/10.1016/j.talanta.2020.121961 Multi-metal Au@Pt


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