Synthesis and optical properties of CdS quantum dots via paraffin liquid and oleic acid

Zainab S Sadeq

doi:10.30723/ijp.v14i29.232

Abstract

In this study, an easy, low-cost, green, and environmentallyfriendlier reagents have been used to prepare CdS QDs, in chemicalreaction method by mixed different ratio of CdO and sulfur inparaffin liquid as solvent and oleic acid as the reacting media indifferent concentration to get the optimum condition of the reactionto formation CdS QDs. The results give an indication that thebehavior is at small concentration of 4ml of the oleic acid is bestconcentration which give CdS QDs of small about to 9.23 nm withnano fiber configuration.

Highlights

Nanocrystalline structures (NCs) have attracted great interest over the past years because their properties are remarkably different from those of bulk materials and can be controlled by the particles composition, size, and surface [1,2,3]
The effect of the synthesis conditions, Cd:S ratio and reaction time on CdS growth shape have studied by scanning electron microscopes (SEM)
The reaction temperature and growth time were fixed at 180 C, 6 minutes and 4ml oleic acid concentration

Summary

Introduction

Nanocrystalline structures (NCs) have attracted great interest over the past years because their properties are remarkably different from those of bulk materials and can be controlled by the particles composition, size, and surface [1,2,3]. Nanoparticles (NPs) possess these interesting characteristics due to several phenomena (quantum confinement of charge carriers, surface effects, and geometrical confinement of phonons, etc.) that turned them into promising materials for many applications, such as light-emitting diodes[4], photovoltaic devices [5], lasers [6], optical memories [7], miniaturized devices, and fluorescent probes in biological labeling [8,9]. Due to the unique electronic and luminescent properties and the applications in biological labeling, light emitting diodes and solar cells. QDs are a type of semiconductor NCs with a size range from one to tens nanometers, consisting of several hundreds to a few thousands of atoms. QDs can be synthesized by chemical methods, known as colloidal QDs, which are coated by a layer of organic surfactant molecules, termed ‘ligands’ on the surface. [10]

Methods

Results

Conclusion