Open AccessEffect of pyridine and pyridine with substituent on photoluminescence of nanoparticles CdS prepared by liquid –liquid interface reaction
Author(s) -
Asar Ahmed
Publication year - 2019
Publication title -
iraqi journal of physics
Language(s) - English
Resource type - Journals
eISSN - 2664-5548
pISSN - 2070-4003
DOI - 10.30723/ijp.v13i28.248
Subject(s) - photoluminescence , substituent , materials science , pyridine , diffraction , transmission electron microscopy , liquid crystal , nanoparticle , supersaturation , analytical chemistry (journal) , crystallography , chemistry , organic chemistry , nanotechnology , optics , optoelectronics , physics
Liquid – liquid interface reaction is the method forpreparation nanoparticles (NP'S) which depend on the supersaturation of ions that provide by using the system that consist fromtoluene and water, the first one is above the second to obtainnanoparticles (NP's) CdS at the interface separated between thesetwo immiscible liquid. The structure properties were characterized byXRD-diffraction and transmission electron microscopy.The crystalline size estimate from X-ray diffraction patternusing Scherer equation to be about 7nm,and by TEM analysis give usthat ananosize is about 5 nm which give a strong comparable withBohr radius. Photoluminescence analysis give two emission peak,the first one around the 380 nm and the second around the 760nmwhich indicate to the band edge and surface defect emissionrespectively and the intensity of these emission change with thechange of the pyridine substituent.