Multifunctional NaYF4:Yb3+, Er3+@Au Nanocomposites: Upconversion Luminescence, Temperature Sensing and Photothermal Therapy

Dong Dong Li; Qi Yue Shao; Yan Dong; Jian Qing Jiang

doi:10.4028/www.scientific.net/AMR.1088.23

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Multifunctional NaYF₄:Yb³⁺, Er³⁺@Au Nanocomposites: Upconversion Luminescence, Temperature Sensing and Photothermal Therapy
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1088Multifunctional NaYF4:Yb3+, Er3+@Au...

Multifunctional NaYF₄:Yb³⁺, Er³⁺@Au Nanocomposites: Upconversion Luminescence, Temperature Sensing and Photothermal Therapy

Abstract:

Composite nanostructures of NaYF₄:Yb³⁺, Er³⁺@Au have been successfully prepared by attaching gold nanoparticles onto the surface of NaYF₄: Yb³⁺, Er³⁺ upconversion nanoparticles (UCNPs). NaYF₄ inert shell was used to adjust the separation distance between gold nanoparticles and UCNPs. Effects of the gold nanoparticles on their upconversion luminescent (UCL), temperature sensing and photothermal therapy properties were systematically investigated. For all samples, a slight decrease of the UCL intensity was observed after gold nanoparticles attachment, suggesting that the nonradiative quenching eﬀect is the dominant interaction between UCNPs and gold nanoparticles. However, the reduction of the UCL intensity is negligible due to the significant improvement of UCL properties by NaYF₄shell. In addition, the gold attachment can obviously improve the photothermal conversion effect, but do not affect the temperature sensing properties of NaYF₄:Yb³⁺, Er³⁺UCNPs, indicating their high capability for multifunctional applications in biomedical fields.

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Periodical:

Advanced Materials Research (Volume 1088)

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23-27

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1088.23

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Online since:

February 2015

Authors:

Dong Dong Li, Qi Yue Shao*, Yan Dong, Jian Qing Jiang

Keywords:

Gold Nanoparticles, NaYF₄:Yb³⁺, Er³⁺, Photothermal Therapy, Temperature Sensing, Upconversion Luminescence

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