Colorimetric Detection of Kanamycin Residue in Foods Based on the Aptamer-Enhanced Peroxidase-Mimicking Activity of Layered WS2 Nanosheets

References

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title
DOI
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1056Colorimetric Detection of Kanamycin Residue in Foods Based on the Aptamer-Enhanced Peroxidase-Mimicking Activity of Layered WS2 Nanosheetshttps://doi.org/10.1021/acs.jafc.1c00925Sulfidelayered WS2 nanosheets

Materials

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size
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BET
b nanozyme
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1056WS2 nanosheetsTEM&AFMThe morphological characteristics of the exfoliated WS2 nanosheets were observed by TEM (Figure 1a). The WS2 nanosheets display a wrinkle shape due to partial overlap and folding, and the diameter of the layered nanosheets ranges from 50 to 300 nm. The AFM image in Figure 1b further proves the above-mentioned morphology and size of layered nanosheets, indicating that the thickness of the WS2 nanosheets is about 13 nm.

Kinetics

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1056WS2 nanosheetsPODTMB11.584mM2.364-8M/s10561056
1056WS2 nanosheetsPODH2O20.714mM1.02-8M/s10561056
1056WS2 nanosheetsPODTMB9.12mM4.795-8M/s10561056
1056WS2 nanosheetsPODH2O20.702mM1.93-8M/s10561056
1056WS2 nanosheetsPODTMB4.437mM10.865-8M/s10561056
1056WS2 nanosheetsPODTMB5.175mM5.096-8M/s10561056
1056WS2 nanosheetsPODH2O20.713mM3.145-8M/s10561056
1056WS2 nanosheetsPODTMB12.125mM2.036-8M/s10561056
1056WS2 nanosheetsPODH2O20.756mM0.844-8M/s10561056
1056WS2 nanosheetsPODH2O20.696mM7.506-8M/s10561056

Applications

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application
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method
linear range
linear ran unit
LOD
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comment
1056WS2 nanosheetsDetection of KanamycinKanamycinColor0.1-0.5μM0.06μM