In situ fabrication of luminescent copper nanoclusters/eggshell membrane composite and applications for visual detection of Ag+ ions, light-emitting diodes and surface patterning
In this work, we report a novel strategy for fabricating luminescent 2D nanocomposite at room temperature by in situ generating luminescent copper nanoclusters (Cu NCs) embedded in natural monolithic eggshell membrane (ESM) using dithiothreitol as reducing and capping agent. The established fabrication is facile, cost-effective and viable. The as-prepared Cu NCs/ESM nanocomposite exhibited excellent photoluminescence performance, improved chemical, thermal and photo stability, convenient tailoring and flexibility. Significantly, the nanocomposites could be employed as test strips for the visual detection of Ag+ ions based on luminescence quenching phenomenon and as color conversion layers in the light-emitting diodes. Furthermore, application of the proposed strategy for surface luminescent patterning was well demonstrated, indicating bright potential in biomass based anti-counterfeiting, information encryption and security paper or sheet.