Synthesis of Fe3O4/PdO heterodimer nanocrystals in silica nanospheres and their controllable transformation into Fe3O4/Pd heterodimers and FePd nanocrystals

Jongmin Shin; Hakwon Kim; In Su Lee

doi:10.1039/B812690A

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Synthesis of Fe₃O₄/PdO heterodimer nanocrystals in silica nanospheres and their controllable transformation into Fe₃O₄/Pd heterodimers and FePd nanocrystals†

Jongmin Shin,^a Hakwon Kim^a and In Su Lee*^a

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* Corresponding authors

^a Department of Chemistry & Advanced Material Sciences, College of Environment and Applied Chemistry, Kyung Hee University, Gyeonggi-do, Korea
E-mail: insulee97@khu.ac.kr
Fax: 82-31-202-7337
Tel: 82-31-201-3823

Abstract

The thermal annealing of silica nanospheres encapsulating Fe₃O₄nanocrystals and Pd²⁺ complexes led to the formation of heterodimers consisting of Fe₃O₄ and PdO nanoparticles encapsulated in a silica shell, allowing for their controllable transformation into either Fe₃O₄/Pd heterodimers or FePd alloy nanocrystals through a solid state reduction process.

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Supplementary files

Experimental procedures for the syntheses of 1, 2, and 3, TEM images of Fe₃O₄ nanoparticles, XPS of 1, EDS of Fe₃O₄/Pd heterodimers, XRDs of 1, 2, 3, and Fe₃O₄ coated by silica, and TEM images of silica nanospheressynthesized in the absence of Fe₃O₄ nanoparticles PDF (933K)

Article information

DOI: https://doi.org/10.1039/B812690A
Article type: Communication
Submitted: 23 Jul 2008
Accepted: 02 Sep 2008
First published: 24 Sep 2008

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Chem. Commun., 2008, 5553-5555

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Synthesis of Fe₃O₄/PdO heterodimer nanocrystals in silica nanospheres and their controllable transformation into Fe₃O₄/Pd heterodimers and FePd nanocrystals

J. Shin, H. Kim and I. S. Lee, Chem. Commun., 2008, 5553 DOI: 10.1039/B812690A

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Chemical Communications