Abstract
Au@SiO2/NaYF4:Tb3+,Yb3+@NaYF4 nanocomposites are acquired by combining Au@SiO2 nanorods with ligand-free NaYF4:Tb3+,Yb3+@NaYF4 nano-particles in water solution due to the electrostatic attraction. Plasmon-enhanced upconversion (UC) and quantum-cutting (QC) are both obtained and optimized in these nanocomposites by adjusting SiO2 shell thickness and concentrations of Au@SiO2. While the thickness of SiO2 shell is 35 nm, the enhancement factor of UC and QC reaches maximum as 1.91 and 3.47 times, respectively. The nanocomposites may be applied in biological fluorescence label, super-resolution imaging and solar cells, etc.
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