Bright and Photostable Fluorescent Metal Nanocluster Supraparticles from Invert Emulsions. (31st August 2022)

• Record Type: Journal Article
• Authors: Zhou, Shaochen; Peng, Bo; Duan, Yanyan; Liu, Kai; Ikkala, Olli; Ras, Robin H. A.
• Is Part Of: Angewandte Chemie. Volume 134:Number 40(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-31
• Subjects: Light-Emitting Diode -- Metal Nanoclusters -- Photoluminescence -- Photostability -- Supraparticles; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202210808
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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. Abstract : Supraparticles of gold, silver and copper nanoclusters are formed by drying the water droplets in invert emulsions, resulting in a profoundly enhanced photoluminescence emission and resistance to photobleaching. The supraparticle structure greatly enhances the performance, where the inhibition of the twisted intermolecular charge transfer is one of the responsible causes.