Bimetallic luminescent nanoclusters
Varvara G. Kubenko1, Nikolay V. Shekhovtsov1, Andrey A. Buglak1 and Alexei I. Kononov1; 1Saint Petersburg State University, Saint Petersburg
Abstract
Metal nanoclusters (NCs) have emerged as a versatile class of nanomaterials with applications spanning bioimaging, biosensing, catalysis, and optoelectronics. Their molecule-like electronic structure, characterized by discrete energy levels separated by an energy gap significantly larger than the thermal energy (kT), gives rise to efficient luminescence. This unique property makes NCs attractive luminophores for biological imaging and sensing applications.
Considerable efforts have been devoted to improving the brightness of metal NCs. Among the most effective strategies is alloying through the incorporation of different metal atoms into the cluster core. In many cases, alloying produces a synergistic enhancement of the luminescence quantum yield (QY), making these materials particularly attractive for optical applications.
This presentation reviews recent advances in luminescent polymetallic nanoclusters which exhibit significant luminescence enhancement. Particular attention is devoted to the physical mechanisms responsible for luminescence enhancement in polymetallic NCs. The presentation also highlight our recent work on DNA-templated Au/Ag nanoclusters which exhibit both luminescence and photostability enhancement.
This work was supported by RSF grant № 25-23-00217.
Speaker
Alexei Kononov
Saint Petersburg State University
Russia
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