New light-emitting nanoparticles can detect subtle chemical differences
Researchers at the University of Toronto have developed dye-sensitized nanoparticles capable of upconverting low-energy near-infrared light into high-energy green luminescence. This technology allows for the precise detection of chemical impurities or pollutants at very low concentrations.
Why it matters
This innovation provides a cost-effective and highly sensitive method for chemical sensing, with potential applications in pharmaceutical quality control and environmental monitoring.
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Add as preferred source When a near-infrared laser is shined on these nanoparticles suspended in a liquid, they upconvert the light energy into bright green luminescence. Credit: Tyler Irving / University of Toronto Engineering A team of researchers from University of Toronto Engineering has created a new type of dye-sensitized nanoparticle that can detect target chemicals at very low concentrations while also distinguishing between molecules with very similar shapes.
When bound to their target molecules, the nanoparticles absorb light in the form of low-energy photons and use it to emit high-energy photons. This chemical-sensing ability could help pharmaceutical manufacturers detect impurities or enable researchers to find tiny traces of chemical pollutants in groundwater.
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