Type: Article

Growth and characterization of CdS and CdS:Ag luminescent quantum dots dispersed in solution

Journal: Modern Physics Letters B (02179849)Year: 10 October 2010Volume: 24Issue: Pages: 2591 - 2599

Yousefi M.H. Abdolhosseinzadeh A.A.Fallah H.^a Khosravi A.A.

a :University of Isfahan - IRAN(IR) - Isfahan

DOI:10.1142/S0217984910024882Language: English

Abstract

A fast-chemically capping method in aqueous solution was developed to synthesize CdS and CdS:Ag luminescent nanoparticles and particles with sizes between 24 nm. The achieving of well-dispersed and narrow-sized particles in colloidal solution and also, high stability of them using mercaptoethanol (ME) as a capping agent was established. Quantum confinement effect was observed in UV-vis absorption as well as in PL spectra. PL spectroscopy also showed green emission and Ag dopants caused a faster energy transfer between CdS inter-bands. XRD patterns exhibited that both cubic and hexagonal phases exist in solutions. Ultimately, TEM images captured from QDs displayed the shapes of nanoclusters which are almost spherical. © 2010 World Scientific Publishing Company.