Silver sulfide nanoparticles with a carbon-containing shell

Abstract

Silver sulfide nanoparticles have been synthesized through chemical deposition from aqueous solutions of silver nitrate and sodium sulfide in the presence of sodium citrate as a complexing agent and stabilizer. The nanoparticles have a Ag 2 S core with a monoclinic crystal structure, covered with a carbon-containing citrate shell. Varying initial reactant concentrations, we can obtain core/shell nanoparticles with a tailored Ag 2 S core size and carbon-containing shell thickness.

Recent progress in nanostructured silver sulfide: from synthesis and nonstoichiometry to properties

“…146 Ag 2 S@C nanoparticles with a carbon-containing citrate shell were found in colloidal solutions prepared from an aqueous solutions of AgNO 3 and Na 2 S at concentrations of 5.0 and 2.5 mmol l À1 or 50 and 25 mmol l À1 , respectively; the Na 3 Cit concentration varied from 5 to 100 mmol l À1 . 68, 136,147 Synthesis was carried out at room temperature in the dark.…”

Synthesis of Ag2S colloidal solutions in D2O heavy water

“…In aqueous solutions with low S 2À ion concentration, sodium citrate can reduce Ag + ions to form silver metal nanoparticles 9,26-28 and form a citrate shell on Ag 2 S particles. 9,[29][30][31][32][33] Therefore, to obtain colloidal solutions of silver sulde without Ag impurities and without a citrate shell, reaction mixtures with a small relative excess of sodium sulde Na 2 S and a minimum concentration of Na 3 Cit were used. The synthesis was carried out in the dark in a neutral medium at pH z 7 by the following reaction scheme…”

Antimicrobial activity of silver sulfide quantum dots functionalized with highly conjugated Schiff bases in a one-step synthesis

“…33,34 The capping agents used to passivate the atoms on the QD surface, which are important to stabilize and prevent the nanocrystalline structures from aggregating, include surfactant (cetyltrimethyl ammonium bromide), 35 sodium dodecyl sulfate, 36 Schiff-base (2-(benzylidene amino)azobenzothiol) ligand, 37 ethylenediaminetetraacetic acid (EDTA), 38 2-mercaptopropioic acid (2-MPA), 10,39 thioglycolic acid (TGA), 40 and or a carboncontaining shells. 41 The objective of this study was to develop NIR active Ag 2 S QDs in a one-pot synthesis with four different Schiff bases (SB) as stabilizing agents. These SB-Ag 2 S QDs are reported for the rst time.…”