Masoud Mojaradi - Department of Chemical Engineering Shahrood branch, Islamic Azad University Shahrood,Iran
Zahra Kiani - Department of Chemical Engineering Shahrood branch, Islamic Azad University Shahrood,Iran
Meysam Namvar - Department of Chemical Engineering Quchan branch, Islamic Azad University Quchan .Iran
Ali Nezahdmohammad - Department of Chemical Engineering Quchan branch, Islamic Azad University Quchan .Iran

The effect of additives on the fluorescence spectra of semiconductor nanoparticles was studied using PbTe particles of various sizes and composition. Based on the fluorescence quenching of quantum dots caused by material a simple, sensitive and rapid method was developed. In the end satisfactory results were obtained. The different synthesis methods was also discussed

synthesis, quantum particles ,PbTe