The Structural Fate of Individual Multicomponent Metal-Oxide Nanoparticles in Polymer Nanoreactors

Jingshan S. Du, Peng Cheng Chen, Brian Meckes, Zhuang Xie, Jinghan Zhu, Yuan Liu, Vinayak P. Dravid*, Chad A. Mirkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Multicomponent nanoparticles can be synthesized with either homogeneous or phase-segregated architectures depending on the synthesis conditions and elements incorporated. To understand the parameters that determine their structural fate, multicomponent metal-oxide nanoparticles consisting of combinations of Co, Ni, and Cu were synthesized by using scanning probe block copolymer lithography and characterized using correlated electron microscopy. These studies revealed that the miscibility, ratio of the metallic components, and the synthesis temperature determine the crystal structure and architecture of the nanoparticles. A Co-Ni-O system forms a rock salt structure largely owing to the miscibility of CoO and NiO, while Cu-Ni-O, which has large miscibility gaps, forms either homogeneous oxides, heterojunctions, or alloys depending on the annealing temperature and composition. Moreover, a higher-ordered structure, Co-Ni-Cu-O, was found to follow the behavior of lower ordered systems.

Original languageEnglish (US)
Pages (from-to)7625-7629
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number26
DOIs
StatePublished - 2017

Keywords

  • doping
  • mixed oxides
  • nanoparticles
  • scanning probe lithography
  • structural evolution

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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