Influence of temperature and precursor concentration on the synthesis of HDA-capped Ag2Se nanoparticles

The size dependent of temperature and precursor concentration on the synthesis of hexadecylamine capped Ag2Se nanoparticles via the colloidal route were studied using the combination of optical and structural analysis. The as-prepared Ag2Se nanoparticles showed the quantum confinement with all the obtained absorption band edges blue-shifted from the bulk and their corresponding emission maxima displaying a red-shift from band edges characterised by UV–vis absorption and photoluminescence spectroscopy. The particle sizes were obtained from transmission electron microscopy analysis. The increase in precursor concentration resulted in a decrease in nanoparticle sizes. The increase in reaction temperature showed an increase in the nanoparticle sizes, when the critical temperature at 160 °C was reached, the nanoparticle sizes decreased.

The temperature effect on the growth and size of silver selenide nanoparticles with the size distribution and XRD patterns.Figure optionsDownload as PowerPoint slideHighlights
► The HDA-capped Ag2Se nanoparticles were synthesized via the colloidal route.
► Temperature and monomer concentration of the reaction were varied.
► The concentration as a factor influenced particles with a decrease observed as the amount of Ag+ ion source is increased.
► Temperature has expected influence on the growth of particles resulting in increase as the temperature is increased.
► TEM images shows spherical particles and their orthorhombic phase from structural analysis by XRD.