A multi-colorimetric immunosensor for visual detection of ochratoxin A by mimetic enzyme etching of gold nanobipyramids

References

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title
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1057A multi-colorimetric immunosensor for visual detection of ochratoxin A by mimetic enzyme etching of gold nanobipyramidshttps://doi.org/10.1007/s00604-020-04699-5Metalgold nanobipyramids (Au NBPs), Cu2O-labled secondary antibody (Cu2O@Ab2)

Materials

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BET
b nanozyme
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1057Au NBPsFinally, after purification, two new absorption peaks at about 684 nm and 510 nm were the longitudinal and transverse LSPR peaks of Au NBPs, respectively.
1057Cu2O@Ab2245nmSEMMeanwhile, in Fig. 1c, the particle size analysis further proved that Cu2O octahedrons presented a sharper size distribution of 245 nm in average.

Kinetics

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Applications

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linear range
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1057Au NBPsvisual detection of ochratoxin AOTAColor1-5000ng/L0.47ng/L