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Enhanced upconversion fluorescent probe of single NaYF₄:Yb³⁺/Er³⁺/Zn²⁺ nanoparticles for copper ion detection.

ABSTRACT: Surface modified NaYF₄:Yb³⁺/Er³⁺/Zn²⁺ upconversion nanoparticles were obtained by using branched polyethylenimine (PEI). Strong fluorescence emission was observed and the influence of copper ions on the fluorescence emission of the PEI-modified NaYF₄:Yb³⁺/Er³⁺/Zn²⁺ nanoparticles was investigated. It was found that the fluorescence emission can be quenched through luminescence resonance energy transfer from the particle to the copper ions. The results show that the PEI modified NaYF₄:Yb³⁺/Er³⁺/Zn²⁺ nanoparticle can be used as a fluorescent probe for highly sensitive and selective detection of copper ions.

SUBMITTER: Zhang B

PROVIDER: S-EPMC9089350 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Enhanced upconversion fluorescent probe of single NaYF4:Yb3+/Er3+/Zn2+ nanoparticles for copper ion detection.

Zhang Baobao B Meng Jiajia J Mi Xiaohu X Zhang Changjian C Zhang Zhenglong Z Zheng Hairong H

RSC advances 20181108 66

Surface modified NaYF4:Yb3+/Er3+/Zn2+ upconversion nanoparticles were obtained by using branched polyethylenimine (PEI). Strong fluorescence emission was observed and the influence of copper ions on the fluorescence emission of the PEI-modified NaYF4:Yb3+/Er3+/Zn2+ nanoparticles was investigated. It was found that the fluorescence emission can be quenched through luminescence resonance energy transfer from th ...[more]

PMID: 35558603

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