A novel ratiometric fluorescent sensing platform for superoxide anion (O2limg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">−) detection.
The incorporation of suffocated polystyrene nanoparticles (PS-SO3H) as a non-interfering internal calibration is benefit for ratiometric fluorescent sensing of O2limg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">−.
The ratio of I544/I463 linearly increases with the increasing of O2limg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">− concentration in the range of 0 nM-6.0 μM with a detection limit as low as 3.4 nM.
We have successfully synthesized core-shell PS-SO3H@Tb/G NCPs.