Effect of pyridine and pyridine with substituent on photoluminescence of nanoparticles CdS prepared by liquid –liquid interface reaction

Abstract

Liquid – liquid interface reaction is the method for preparation nanoparticles (NP'S) which depend on the super saturation of ions that provide by using the system that consist from toluene and water, the first one is above the second to obtain nanoparticles (NP's) CdS at the interface separated between these two immiscible liquid. The structure properties were characterized by XRD-diffraction and transmission electron microscopy. The crystalline size estimate from X-ray diffraction pattern using Scherer equation to be about 7nm,and by TEM analysis give us that ananosize is about 5 nm which give a strong comparable with Bohr radius. Photoluminescence analysis give two emission peak, the first one around the 380 nm and the second around the 760nm which indicate to the band edge and surface defect emission respectively and the intensity of these emission change with the change of the pyridine substituent.

Keywords

• Nanoparticle, Liquid- Liquid Interface reaction, surface modification, Photoluminescence.