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Ultra-small molybdenum disulfide nanoparticles (MoS 2 NPs) were prepared by a facile liquid exfoliation method with ethanol/water as the solvent. The produced MoS 2 NPs were of high purity due to the easily removable ethanol/water solution. The prepared MoS 2 NPs exhibited an intrinsic peroxidase-like activity in analogy to that of horseradish peroxidase (HRP). A custom-made spectrometer was employed to investigate the peroxidase-like activity of MoS 2 NPs in the presence of H 2 O 2 and glucose. The change in absorption detected from MoS 2 NPs is proportional to the amount of target. The calibration curve of H 2 O 2 and glucose shows a good relationship between the concentration of target and the change in the absorption of MoS 2 NPs. The limit of detection of H 2 O 2 and glucose achieved by this method could approach 1.25 μM and 7 μM respectively. This method has been applied for the detection of glucose in serum from humans. Therefore, these produced MoS 2 NPs offer an alternative high-efficiency and economic way to detect diabetes.

Mixed-solvent liquid exfoliated MoS2NPs as peroxidase mimetics for colorimetric detection of H2O2and glucose

Mixed-solvent liquid exfoliated MoS₂NPs as peroxidase mimetics for colorimetric detection of H₂O₂and glucose