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<p>Multimodal luminescent materials have garnered significant attention due to their potential applications in multiplexed biosensing, multi-mode temperature sensing, and multidimensional displays. However, achieving high-performance simultaneous multimodal luminescence and multifunctionality remains a considerable challenge. In this work, NaNd<sub>0.7</sub>Gd<sub>0.3</sub>F<sub>4</sub>:Yb@NaYF<sub>4</sub>:Yb/Er@NaGdF<sub>4</sub>:Yb/Tm core@shell@shell upconversion (UC) nanoparticles (NPs) were developed to address this challenge. These UCNPs enable simultaneous multi-mode temperature and organic sensing with enhanced sensitivity. By utilizing temperature-dependent intensity ratio variations of <i>I</i><sub>520</sub>/<i>I</i><sub>550</sub>, <i>I</i><sub>697</sub>/<i>I</i><sub>650</sub>, and <i>I</i><sub>697</sub>/<i>I</i><sub>475</sub>, multi-mode temperature sensing was achieved. The core@shell@shell UCNPs demonstrated a remarkable maximum relative sensitivity of 2.27%/K, which is higher than many previously reported lanthanide-doped UC systems. Moreover, these UCNPs were effectively applied for multi-channel molecular detection under both 980 and 808 nm excitation. The detection limits for methyl orange (MO) and rhodamine B (RhB) dye molecules were as low as 0.48 and 0.57 µg/mL, respectively, further demonstrating their superior performance compared to most other lanthanide-doped UC systems reported in the literature. The results emphasize the high potential of these core@shell@shell UCNPs for advanced multimodal sensing applications, offering promising solutions for areas such as environmental monitoring, biomedical diagnostics, and multi-channel molecular analysis.</p>

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Lanthanide-doped fluoride core@dual-shells nanoparticles for multi-mode temperature and molecular sensing

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • Zouyun Jiang,
  • Yubin Wang,
  • Fei E.,
  • Su Zhou,
  • Jingtao Zhao,
  • Deyang Li,
  • Shiqing Xu,
  • Lei Lei

摘要

Multimodal luminescent materials have garnered significant attention due to their potential applications in multiplexed biosensing, multi-mode temperature sensing, and multidimensional displays. However, achieving high-performance simultaneous multimodal luminescence and multifunctionality remains a considerable challenge. In this work, NaNd0.7Gd0.3F4:Yb@NaYF4:Yb/Er@NaGdF4:Yb/Tm core@shell@shell upconversion (UC) nanoparticles (NPs) were developed to address this challenge. These UCNPs enable simultaneous multi-mode temperature and organic sensing with enhanced sensitivity. By utilizing temperature-dependent intensity ratio variations of I520/I550, I697/I650, and I697/I475, multi-mode temperature sensing was achieved. The core@shell@shell UCNPs demonstrated a remarkable maximum relative sensitivity of 2.27%/K, which is higher than many previously reported lanthanide-doped UC systems. Moreover, these UCNPs were effectively applied for multi-channel molecular detection under both 980 and 808 nm excitation. The detection limits for methyl orange (MO) and rhodamine B (RhB) dye molecules were as low as 0.48 and 0.57 µg/mL, respectively, further demonstrating their superior performance compared to most other lanthanide-doped UC systems reported in the literature. The results emphasize the high potential of these core@shell@shell UCNPs for advanced multimodal sensing applications, offering promising solutions for areas such as environmental monitoring, biomedical diagnostics, and multi-channel molecular analysis.