Development of Stable Water‐Soluble Supratomic Silver Clusters Utilizing A Polyoxoniobate‐Protected Strategy: Giant Core‐Shell‐Type Ag8@Nb162 Fluorescent Nanocluster

AgNC has interesting temperature- and pH-dependent reversible fluorescence response, based on which a multiple optical encryption mode for anti-counterfeit technology was demonstrated. This work offers a promising avenue for the synthesis of fascinating and stable PONb-protected AgNCs and sheds light on the development of new-type optical functional materials.