Dish-like higher-ordered palladium nanostructures through metal ion-ligand complexation

Xi Yin, Miao Shi, Kam Sang Kwok, Haidong Zhao, Danielle L. Gray, Jeffery A. Bertke, Hong Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Unlike nucleation and growth in simple precipitation processes, described by the classical theory, metal nanoparticles formed in organic solvents with capping ligands often involve chemical reactions that occur homogeneously in solution or heterogeneously on the metal surface. These chemical reactions lead to the formation of intermediates that occurs in the process of deposition onto nuclei during the reduction. The understanding of these chemical reactions would enable a better design of functional metal nanocrystals, even those with unconventional hierarchical morphologies. In this study, we report the formation of dish-shaped nanostructures of palladium (Pd) obtained from palladium acetylacetonate (Pd(acac)2) in the presence of oleylamine and oleic acid. The process was correlated with the kinetic-controlled evolution of two-dimensional (2D) Pd nanosheets. The formation of Pd-ligand complexes was revealed using single-crystal X-ray diffraction, ultraviolet-visible spectroscopy, and mass spectrometry. These intermediates affected the formation kinetics of the 2D nanostructures and higher-ordered morphology of the nanodishes. [Figure not available: see fulltext.].

Original languageEnglish (US)
Pages (from-to)3442-3452
Number of pages11
JournalNano Research
Volume11
Issue number6
DOIs
StatePublished - Jun 1 2018

Keywords

  • complexation
  • growth
  • nanoplates
  • nucleation
  • palladium
  • two-dimensional materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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