Atomically Precise Gold Nanoclusters: Shedding Light on Promising Photoluminescent Frontiers

Sakshi Uttam Kamble, Chenjie Zeng

University of Florida

The intriguing photoluminescence (PL) exhibited by atomically precise gold nanoclusters (NCs) is a consequence of their non-metallic nature and discrete electronic energy levels, presenting an important research area for biomedicine and clean energy conversion. The superior photostability and biocompatibility of gold NCs over organic fluorophores and semiconductor quantum dots, as well as their non-toxic and environmentally friendly nature, position them as a promising material class for diverse applications.  In this poster presentation, I will introduce the recent advances in size-focusing methodology and the transformation chemistry to enable precise control over these ultrasmall gold nanoparticles (< 2 nm). As surface-protecting ligands play a pivotal role in shaping the structures and properties of NCs, precise surface engineering is important for boosting PL quantum yields. I will also discuss the possible mechanisms that govern ligand-induced enhancement of photoluminescence, elucidating the intricate relationship between ligand chemistry and photophysical phenomena. Finally, I will discuss the potential applications of NCs for tailored photoluminescence in fields such as bioimaging, biomedicine, photonics, solar energy conversion, and beyond, underscoring the significance of rational design and optimization strategies for their development.