In
this paper, a core–shell structure of Au<sub>nanoparticle</sub>@mSiO<sub>2</sub> with controllable thickness of silica was synthesized
by a modified one-pot process and then europium complex of PABI-Eu
was grafted on the surface of Au<sub>nanoparticle</sub>@mSiO<sub>2</sub> nanostructure to successfully construct the resulting Au<sub>nanoparticle</sub>@mSiO<sub>2</sub>@PABI-Eu nanocomposite. The spectroscopic result
revealed that the emission intensity of the Au<sub>nanoparticle</sub>@mSiO<sub>2</sub>@PABI-Eu nanocomposite is highly dependent on the
thickness of silica. The enhancement factor of 4.20 is achieved at
30 nm thickness of silica between Au nanoparticle and PABI-Eu complex
