Surfactant-free syntheses and pair distribution function analysis of osmium nanoparticles

Mikkel Juelsholt, Jonathan Quinson*, Emil T. S. Kjær, Baiyu Wang, Rebecca Pittkowski, Susan R. Cooper, Tiffany L. Kinnibrugh, Søren B. Simonsen, Luise Theil Kuhn, María Escudero-Escribano, Kirsten M. Ø. Jensen*

*Corresponding author for this work

Research output: Contribution to journalLetterResearchpeer-review

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Abstract

A surfactant-free synthesis of precious metal nanoparticles (NPs) performed in alkaline low-boiling-point solvents has been recently reported. Monoalcohols are here investigated as solvents and reducing agents to obtain colloidal Os nanoparticles by using low-temperature (<100 °C) surfactant-free syntheses. The effect of the precursor (OsCl3 or H2OsCl6), precursor concentration (up to 100 mM), solvent (methanol or ethanol), presence or absence of a base (NaOH), and addition of water (0 to 100 vol %) on the resulting nanomaterials is discussed. It is found that no base is required to obtain Os nanoparticles as opposed to the case of Pt or Ir NPs. The robustness of the synthesis for a precursor concentration up to 100 mM allows for the performance of X-ray total scattering with pair distribution function (PDF) analysis, which shows that 1–2 nm hexagonal close packed (hcp) NPs are formed from chain-like [OsOxCly] complexes.
Original languageEnglish
JournalBeilstein Journal of Nanotechnology
Volume13
Pages (from-to)230-235
Number of pages6
ISSN2190-4286
DOIs
Publication statusPublished - 2022

Keywords

  • Metal nanoparticles
  • Osmium
  • Pair distribution function
  • Surfactant-free synthesis

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