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Enhancing the Upconversion Luminescence and Photothermal Conversion Properties of ~800nm Excitable core/shell Nanoparticles by Dye Molecule Sensitization

Enhancing the Upconversion Luminescence and Photothermal Conversion Properties of ~800nm Excitable core/shell Nanoparticles by Dye Molecule Sensitization

Qiyue Shao, Xiaosong Li, Peiyi Hua, Gongtuo Zhang, Yan Dong, Jianqing Jiang

J Colloid Interface Sci. 2017 Jan 15;486:121-127.

PMID: 27697649

Abstract:

Upconversion nanoparticles capable of strongly absorbing photons in a wide spectral range are highly desired for practical applications. In this work, IR-806 dye was used to increase the light absorptivity of Nd3+/Yb3+/Er3+ tri-doped core/shell nanoparticles and then to enhance their upconversion luminescence under ∼800nm excitation. The IR-806 dye exhibited more efficient energy transfer to Nd3+ ions than to Yb3+ ions for subsequent upconversion emission due to the increased spectral overlap between the dye emission and Nd3+ absorption. The influence of the Nd3+ concentration in the shell and the dye/nanoparticle ratio on the dye-sensitization effect was also investigated. A maximum 28-fold overall enhancement in the emission intensity was achieved for NaYF4:Yb3+/Er3+@NaYF4:Yb3+/Nd3+ core/shell nanoparticles using dye sensitization. The dye-sensitized NaYF4:Yb3+/Er3+@NaYF4:Yb3+/Nd3+ core/shell nanoparticles also exhibited increased photothermal conversion capabilities and excellent temperature sensing properties, enabling their potential application in photothermal nanoheaters with real-time temperature monitoring under 808nm single beam excitation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS77556	IR-806			Price

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