Abstract
Au nanoparticle (Au NP)@SiO2@TDA-Eu nanocomposites were prepared by a two-step process: Au NP@SiO2 nanocomposites were prepared by a modified onepot process. Then the europium coordination polymer was deposited on the surface of the Au NP@SiO2 by mixing 2,2’-thiodiacetic acid [S(CH2COO)22-, TDA] and Eu(NO3)3·6H2O in ethanol via a hydrothermal method. The maximum fluorescent enhancement factor of the nanocomposites was 6.81 at 30 nm thickness of silica between the core of the Au NP and the shell of TDA-Eu. The prepared nanocomposites exhibit more sensitive monitoring of reactive oxygen species.
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