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Formation of Hollow Iron Oxide Tetrapods via a Shape‐Preserving Nanoscale Kirkendall Effect
Author(s) -
Lian Jie,
Anggara Kelvin,
Lin Ming,
Chan Yinthai
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201302006
Subject(s) - kirkendall effect , nucleation , nanotechnology , oxide , iron oxide , nanostructure , materials science , tetrapod (structure) , nanoscopic scale , computer science , metallurgy , chemistry , geology , paleontology , organic chemistry
Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods . Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape‐preserving Kirkendall effect which preserves the morphology of the original tetrapod with remarkably high precision, offering a robust synthetic route to hollow iron oxide nanostructures of unprecedented geometry.