Simple Surfactant Concentration-Dependent Shape Control of Polyhedral Fe3O4 Nanoparticles and Their Magnetic Properties

Wanyin Ge, Ryota Sato, Hsin Lun Wu, Toshiharu Teranishi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The shape and size of monodisperse Fe3O4 nanoparticles (NPs) are controlled using a chemical solution synthesis in the presence of the surfactant cetylpyridinium chloride (CPC). Cubic Fe3O4 NPs surrounded by six {100} planes are obtained in the absence of CPC. Increasing the CPC content during synthesis causes the shape of the resulting Fe3O4 NPs to change from cubic to truncated cubic, cuboctahedral, truncated octahedral, and finally octahedral. During this evolution, the predominantly exposed planes of the Fe3O4 NPs vary from {100} to {111}. The shape control results from the synergistic effect of the pyridinium cations, chloride anions, and long-chain alkyl groups of CPC, which is confirmed by comparison with NPs synthesized in the presence of various related cationic surfactants. The size of the cubic Fe3O4 NPs can be tuned from 50 to 200nm, by changing the concentration of oleic acid in the reaction solution. The Fe3O4 NPs exhibit shape-dependent saturation magnetization, remanent magnetization, and coercivity.

Original languageEnglish
Pages (from-to)3200-3205
Number of pages6
JournalChemPhysChem
Volume16
Issue number15
DOIs
Publication statusPublished - 2015 Oct 1

Fingerprint

shape control
Surface-Active Agents
Magnetic properties
Cetylpyridinium
surfactants
Nanoparticles
magnetic properties
nanoparticles
chlorides
magnetization
oleic acid
Cationic surfactants
Saturation magnetization
Oleic Acid
synthesis
Coercive force
coercivity
Anions
Cations
Chlorides

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

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title = "Simple Surfactant Concentration-Dependent Shape Control of Polyhedral Fe3O4 Nanoparticles and Their Magnetic Properties",
abstract = "The shape and size of monodisperse Fe3O4 nanoparticles (NPs) are controlled using a chemical solution synthesis in the presence of the surfactant cetylpyridinium chloride (CPC). Cubic Fe3O4 NPs surrounded by six {100} planes are obtained in the absence of CPC. Increasing the CPC content during synthesis causes the shape of the resulting Fe3O4 NPs to change from cubic to truncated cubic, cuboctahedral, truncated octahedral, and finally octahedral. During this evolution, the predominantly exposed planes of the Fe3O4 NPs vary from {100} to {111}. The shape control results from the synergistic effect of the pyridinium cations, chloride anions, and long-chain alkyl groups of CPC, which is confirmed by comparison with NPs synthesized in the presence of various related cationic surfactants. The size of the cubic Fe3O4 NPs can be tuned from 50 to 200nm, by changing the concentration of oleic acid in the reaction solution. The Fe3O4 NPs exhibit shape-dependent saturation magnetization, remanent magnetization, and coercivity.",
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Simple Surfactant Concentration-Dependent Shape Control of Polyhedral Fe3O4 Nanoparticles and Their Magnetic Properties. / Ge, Wanyin; Sato, Ryota; Wu, Hsin Lun; Teranishi, Toshiharu.

In: ChemPhysChem, Vol. 16, No. 15, 01.10.2015, p. 3200-3205.

Research output: Contribution to journalArticle

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