Control of Photoluminescence Intensity in Nanostructured Layers of Lipid-soluble Quantum Dots and Water-soluble Gold Nanoparticles

We propose a new preparation method for layered structures consisting of lipid-soluble CdSe quantum dots (QDs) and water-soluble Au nanoparticles (NPs). The self-assembled monolayer of (3-mercaptopropyl)trimethoxysilane (MPTMS) was introduced as a “binder” of lipid-soluble QDs on a polyelectrolyte layer (PE). Furthermore, the separation distance between the CdSe QDs and the Au NP layers was controlled by the thickness of the PE layers, and the systematic change from PL quenching to PL enhancement of the CdSe QDs is observed.