Morphology Engineering in Multicomponent Hollow Metal Chalcogenide Nanoparticles

Bo Shen, Liliang Huang, Jiahong Shen, Xiaobing Hu, Peichen Zhong, Cindy Y. Zheng, Chris Wolverton, Chad A. Mirkin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Hollow metal chalcogenide nanoparticles are widely applicable in environmental and energy-related processes. Herein, we synthesized such particles with large compositional and morphological diversity by combining scanning probe block copolymer lithography with a Kirkendall effect-based sulfidation process. We explored the influence of temperature-dependent diffusion kinetics, elemental composition and miscibility, and phase boundaries on the resulting particle morphologies. Specifically, CoNi alloys form single-shell sulfides for the synthetic conditions explored because Co and Ni exhibit similar diffusion rates, while CuNi alloys form sulfides with various types of morphologies (yolk-shell, double-shell, and single-shell) because Cu and Ni have different diffusion rates. In contrast, Co-Cu heterodimers form hollow heterostructured sulfides with varying void numbers and locations depending on synthesis temperature and phase boundary. At higher temperatures, the increased miscibility of CoS2and CuS makes it energetically favorable for the heterostructure to adopt a single alloy shell morphology, which is rationalized using density functional theory-based calculations.

Original languageEnglish (US)
Pages (from-to)4642-4649
Number of pages8
JournalACS nano
Issue number5
StatePublished - Mar 14 2023


  • Heterostructures
  • Hollow nanoparticles
  • Kirkendall effect
  • Metal chalcogenide
  • Nanolithography

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)
  • Materials Science(all)


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