Synthesis of Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes from sacrificial Ag nanorod templates

Hyunbae Dong, Eoi Kwan Koh, Sang Yup Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Our research focuses on the preparation of Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes which have various engineering applications. Hausmannite manganese oxide (Mn 3O 4) nanotubes were synthesized via a galvanic replacement reaction at mild reaction conditions. The Mn 3O 4 nanotubes were prepared by solidification of manganese ions on a sacrificial silver nanorod due to the standard reduction potential difference between solid silver and manganese ions. The Mn ions were reduced to solid while the solid Ag rod was oxidized to ions. Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes were simply prepared by changing the amount of manganese ions. The Mn 3O 4 layer in the nanorods and nanotubes had a Hausmannite crystalline structure and showed weak hysteresis of magnetism. This weak magnetism is likely due to the diamagnetic property of silver and multiple magnetic domain of Mn 3O 4. This simple replacement reaction could be applied to various oxide nanotube fabrications with exact shape control.

Original languageEnglish
Pages (from-to)6511-6517
Number of pages7
JournalJournal of Nanoscience and Nanotechnology
Volume9
Issue number11
DOIs
Publication statusPublished - 2009 Nov 1

Fingerprint

Nanotubes
Nanorods
nanorods
nanotubes
templates
manganese ions
Ions
synthesis
Manganese
Silver
silver
Magnetism
shape control
Magnetic domains
ions
Manganese oxide
manganese oxides
magnetic domains
Oxides
solidification

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "Our research focuses on the preparation of Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes which have various engineering applications. Hausmannite manganese oxide (Mn 3O 4) nanotubes were synthesized via a galvanic replacement reaction at mild reaction conditions. The Mn 3O 4 nanotubes were prepared by solidification of manganese ions on a sacrificial silver nanorod due to the standard reduction potential difference between solid silver and manganese ions. The Mn ions were reduced to solid while the solid Ag rod was oxidized to ions. Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes were simply prepared by changing the amount of manganese ions. The Mn 3O 4 layer in the nanorods and nanotubes had a Hausmannite crystalline structure and showed weak hysteresis of magnetism. This weak magnetism is likely due to the diamagnetic property of silver and multiple magnetic domain of Mn 3O 4. This simple replacement reaction could be applied to various oxide nanotube fabrications with exact shape control.",
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Synthesis of Ag-Mn 3O 4 core-shell nanorods and Mn 3O 4 nanotubes from sacrificial Ag nanorod templates. / Dong, Hyunbae; Koh, Eoi Kwan; Lee, Sang Yup.

In: Journal of Nanoscience and Nanotechnology, Vol. 9, No. 11, 01.11.2009, p. 6511-6517.

Research output: Contribution to journalArticle

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