Direct Synthesis and Pseudomorphic Transformation of Mixed Metal Oxide Nanostructures with Non-Close-Packed Hollow Sphere Arrays

Zhendong Liu, Wenyang Zhao, Prashant Kumar, Xinyu Li, Yasser Al Wahedi, K. Andre Mkhoyan, Michael Tsapatsis, Andreas Stein

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

While bottom-up syntheses of ordered nanostructured materials at colloidal length scales have been successful at producing close-packed materials, it is more challenging to synthesize non-close-packed (ncp) structures. Here, a metal oxide nanostructure with ncp hollow sphere arrays was synthesized by combining a polymeric colloidal crystal template (CCT) with a Pechini precursor. The CCT provided defined confinement through its tetrahedral (Td) and octahedral (Oh) voids where the three-dimensionally (3D) ordered, ncp hollow sphere arrays formed as a result of a crystallization-induced rearrangement. This nanostructure, consisting of alternating, interconnected large and small hollow spheres, is distinct from the inverse opal structures typically generated from these CCTs. The morphology of the ncp hollow sphere arrays was retained in pseudomorphic transformations involving sulfidation and reoxidation cycling despite the segregation of zinc during these steps.

Original languageEnglish (US)
Pages (from-to)15707-15711
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number48
DOIs
StatePublished - Nov 26 2018

Keywords

  • hierarchical structures
  • hollow sphere arrays
  • metal oxide
  • nanostructures
  • non-close-packed architecture

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