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A novel Hg2+-responsive thermometer system for translating mercury detection into a temperature monitoring was developed based on an aggregation-activated oxidase-like activity of gold nanoparticles.

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A self‐assembled Pd nanoparticle‐containing ionic liquid as metal–organic polymer was successfully prepared. The structure of the catalyst was characterized using Fourier transform infrared and 1H NMR spectroscopies, scanning electron microscopy and elemental analysis. The catalyst was effectively employed in the palladium‐catalyzed Heck reaction in water as a green solvent. Moreover, due to its stability the catalyst can be recovered simply and effectively and reused nine times without much loss of activity.

A new surface chemistry-based modulation for constructing activity-controllable Pt nanoparticle nanozymes and their application in the development of a triple signal readout-based three-in-one sensor for Cu2+ determination.