Green and facile synthesis of polyethyleneimine-protected fluorescent silver nanoclusters for the highly specific biosensing of curcumin

In the present work, silver nanoclusters (Ag NCs) were established as a nanosensor for fluorescence determination of curcumin (Cur) for the first time. The silver nanoclusters were prepared by using polyethyleneimine as the stabilizer and ascorbic acid as the reducing agent. It displayed green emission around 510 nm. The fluorescence quenching mechanism between Ag NCs and Cur was studied and might be attributed to the static quenching and inner...