Controlled Synthesis of Platinum and Silver Nanoparticles Using Multivalent Ligands

Suguna Perumal, Raji Atchudan, Eckart Rühl, Christina Graf

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Here, the controlled formation of platinum nanoparticles (PtNPs) and silver nanoparticles (AgNPs) using amine-functionalized multivalent ligands are reported. The effects of reaction temperature and ligand multivalency on the growth kinetics, size, and shape of PtNPs and AgNPs were systematically studied by performing a stepwise and a one-step process. PtNPs and AgNPs were prepared in the presence of amine ligands using platinum (II) acetylacetonate and silver (I) acetylacetonate, respectively. The effects of ligands and temperature on the formation of PtNPs were studied using a transmission electron microscope (TEM). For the characterization of AgNPs, additionally, ultraviolet-visible (UV-Vis) absorption was employed. The TEM measurements revealed that PtNPs prepared at different temperatures (160–200C, in a stepwise process) are monodispersed and of spherical shape regardless of the ligand multivalency or reaction temperature. In the preparation of PtNPs by the one-step process, ligands affect the shape of the PtNPs, which can be explained by the affinity of the ligands. The TEM and UV-Vis absorption studies on the formation of AgNPs with mono-, di-, and trivalent ligands showed narrower size distributions, while increasing the temperature from 80C to 120C and with a trivalent ligand in a one-step process.

Original languageEnglish
Article number2294
JournalNanomaterials
Volume12
Issue number13
DOIs
StatePublished - 1 Jul 2022

Keywords

  • Ag(acac)
  • Pt(acac)
  • digestive ripening
  • monodisperse nanoparticles
  • multivalent ligands
  • size distribution

Fingerprint

Dive into the research topics of 'Controlled Synthesis of Platinum and Silver Nanoparticles Using Multivalent Ligands'. Together they form a unique fingerprint.

Cite this