Bright and Photostable Fluorescent Metal Nanocluster Supraparticles from Invert Emulsions

| openaire: EC/H2020/742829/EU//DRIVEN Funding Information: Dr. Hua Jiang is acknowledged for his assistance in TEM characterization. This work was supported by ERC (Advanced Grant DRIVEN, No. 742829), the Academy of Finland (No. 310799, 321443, 13332370 and 328942). This work was carried out under the Academy of Finland Center of Excellence Program (2022–2029) in Life‐Inspired Hybrid Materials (LIBER) (project numbers 346108 and 346109). The facilities and technical support provided by Aalto University Nanomicroscopy Center (Aalto‐NMC), and computing time from CSC‐IT Center for Science are gratefully acknowledged. Publisher Copyright: © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.Fluorescent supraparticles of gold, silver and copper nanoclusters are synthesized by simply drying of invert emulsions, resulting in a dozen-fold increase in photoluminescence quantum yield (up to ≈80 %) and a significant improvement in photostability. The inhibition of the ligand twisting during the intramolecular charge transfer is found to be responsible for the enhancement, especially for the gold nanocluster supraparticles. This research provides a general, flexible, and easy method for producing highly luminescent and photostable metal nanocluster-based materials that promise practical applications in white-light-emitting diodes.Peer reviewe