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Sequential addition of cations increases photoluminescence quantum yield of metal nanoclusters near unity

Author

Listed:
  • Xue Wang

    (Jilin University)

  • Yuan Zhong

    (Jilin University)

  • Tingting Li

    (Jilin Jianzhu University)

  • Kunyu Wang

    (Jilin University)

  • Weinan Dong

    (Jilin University)

  • Min Lu

    (Jilin University)

  • Yu Zhang

    (Jilin University)

  • Zhennan Wu

    (Jilin University)

  • Aiwei Tang

    (Beijing Jiaotong University)

  • Xue Bai

    (Jilin University)

Abstract

Photoluminescence is one of the most intriguing properties of metal nanoclusters derived from their molecular-like electronic structure, however, achieving high photoluminescence quantum yield (PLQY) of metal core-dictated fluorescence remains a formidable challenge. Here, we report efficient suppression of the total structural vibrations and rotations, and management of the pathways and rates of the electron transfer dynamics to boost a near-unity absolute PLQY, by decorating progressive addition of cations. Specifically, with the sequential addition of Zn2+, Ag+, and Tb3+ into the 3-mercaptopropionic acids capped Au nanoclusters (NCs), the low-frequency vibration of the metal core progressively decreases from 144.0, 55.2 to 40.0 cm−1, and the coupling strength of electrons-high-frequency vibration related to surface motifs gradually diminishes from 40.2, 30.5 to 14.4 meV. Moreover, introducing cation additives significantly reduces electron transfer time from 40, 27 to 12 ps in the pathway from staple motifs to the metal core. This benefits from the shrinkage of the total structure that speeds up the shell-core electron transition, and in particular, the Tb3+ provides a hopping platform for the excited electrons as their intrinsic ladder-like energy level structure. As a result, it allows a remarkable enhancement in PLQY, from 51.2%, 83.4%, up to 99.5%.

Suggested Citation

  • Xue Wang & Yuan Zhong & Tingting Li & Kunyu Wang & Weinan Dong & Min Lu & Yu Zhang & Zhennan Wu & Aiwei Tang & Xue Bai, 2025. "Sequential addition of cations increases photoluminescence quantum yield of metal nanoclusters near unity," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-55975-y
    DOI: 10.1038/s41467-025-55975-y
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