Rapid Synthesis of AgInS2/ZnS Core/Shell Nanoparticles and Their Luminescence Property

We have successfully synthesized AgInS₂ core and AgInS₂ /ZnS core/shell nanoparticles by the sonochemical method. The ultrasonic based AgInS₂ and AgInS₂ /ZnS nanoparticle synthesis can be utilized as a simple and rapid method. The AgInS₂ /ZnS nanoparticles show the higher fluorescence intensity and quantum yield than AgInS₂ nanoparticles. Fluorescence wavelength of AgInS₂ /ZnS shows blue shift from 635 nm to 610 nm against AgInS₂ because of reducing the defect sites and increasing spatial confinements. For the fluorescence lifetime, AgInS₂ /ZnS (124.8 ns) has longer lifetime than AgInS₂ (54.8 ns).