Direct Synthesis and Pseudomorphic Transformation of Mixed Metal Oxide Nanostructures with Non‐Close‐Packed Hollow Sphere Arrays. (9th November 2018)

• Record Type: Journal Article
• Authors: Liu, Zhendong; Zhao, Wenyang; Kumar, Prashant; Li, Xinyu; Al Wahedi, Yasser; Mkhoyan, K. Andre; Tsapatsis, Michael; Stein, Andreas
• Is Part Of: Angewandte Chemie. Volume 130:Number 48(2018)
• Page Start: 15933
• Page End: 15937
• Publication Date: 2018-11-09
• Subjects: Hierarchische Strukturen -- Hohlkugelarrays -- Metalloxide -- Nanostrukturen -- Nicht dichtgepackte Architekturen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201808826
• Languages: English
• ISSNs: 0044-8249

Abstract

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.