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Full shell coating or cation exchange enhances luminescence

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  • Yi Zhang

    (National University of Singapore)

  • Pengpeng Lei

    (National University of Singapore)

  • Xiaohui Zhu

    (Shanghai University)

  • Yong Zhang

    (National University of Singapore)

Abstract

Core-shell structure is routinely used for enhancing luminescence of optical nanoparticles, where the luminescent core is passivated by an inert shell. It has been intuitively accepted that the luminescence would gradually enhance with the coverage of inert shell. Here we report an “off-on” effect at the interface of core-shell upconversion nanoparticles, i.e., regardless of the shell coverage, the luminescence is not much enhanced unless the core is completely encapsulated. This effect indicates that full shell coating on the luminescent core is critical to significantly enhance luminescence, which is usually neglected. Inspired by this observation, a cation exchange approach is used to block the energy transfer between core nanoparticle and surface quenchers. We find that the luminescent core exhibits enhanced luminescence after cation exchange creates an effective shell region. These findings are believed to provide a better understanding of the interfacial energy dynamics and subsequent luminescence changes.

Suggested Citation

  • Yi Zhang & Pengpeng Lei & Xiaohui Zhu & Yong Zhang, 2021. "Full shell coating or cation exchange enhances luminescence," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26490-7
    DOI: 10.1038/s41467-021-26490-7
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    References listed on IDEAS

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    1. Zhen Zhang & Muthu Kumara Gnanasammandhan Jayakumar & Xiang Zheng & Swati Shikha & Yi Zhang & Akshaya Bansal & Dennis J. J. Poon & Pek Lim Chu & Eugenia L. L. Yeo & Melvin L. K. Chua & Soo Khee Chee &, 2019. "Upconversion superballs for programmable photoactivation of therapeutics," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    2. Shihui Wen & Jiajia Zhou & Kezhi Zheng & Artur Bednarkiewicz & Xiaogang Liu & Dayong Jin, 2018. "Advances in highly doped upconversion nanoparticles," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    3. Bin Zhou & Bing Tang & Chuang Zhang & Changyun Qin & Zhanjun Gu & Ying Ma & Tianyou Zhai & Jiannian Yao, 2020. "Enhancing multiphoton upconversion through interfacial energy transfer in multilayered nanoparticles," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
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