Size-dependent magnetic properties of naked and ligand-capped nickel nanoparticles

Akinori Sugiyama, Yousuke Taguchi, Shuhei Nagaoka, Atsushi Nakajima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ligand-free naked and oleylamine-capped nickel nanoparticles (Ni NPs) were size-selectively prepared in the size ranges of 5-17 nm (naked) and 13-19 nm (capped) in diameter through gas- and liquid-phase syntheses, respectively. As for the magnetic properties of both the naked and oleylamine-capped Ni NPs, the blocking temperatures, TB, increase with the size, where TB for the naked Ni NPs are significantly higher than that for the capped Ni NPs. The results indicate that the ferromagnetic core region of Ni NPs is reduced by the formation of nonmagnetic layers at the surface of the capped NPs, where their thickness is estimated to be 1-2 nm.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalChemical Physics Letters
Volume485
Issue number1-3
DOIs
Publication statusPublished - 2010 Jan 18

Fingerprint

Nickel
Magnetic properties
nickel
Nanoparticles
magnetic properties
Ligands
nanoparticles
ligands
liquid phases
Gases
vapor phases
Liquids
synthesis
Temperature
temperature
oleylamine

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Size-dependent magnetic properties of naked and ligand-capped nickel nanoparticles. / Sugiyama, Akinori; Taguchi, Yousuke; Nagaoka, Shuhei; Nakajima, Atsushi.

In: Chemical Physics Letters, Vol. 485, No. 1-3, 18.01.2010, p. 129-132.

Research output: Contribution to journalArticle

Sugiyama, Akinori ; Taguchi, Yousuke ; Nagaoka, Shuhei ; Nakajima, Atsushi. / Size-dependent magnetic properties of naked and ligand-capped nickel nanoparticles. In: Chemical Physics Letters. 2010 ; Vol. 485, No. 1-3. pp. 129-132.
@article{01f00490131843569100919bc3e32e49,
title = "Size-dependent magnetic properties of naked and ligand-capped nickel nanoparticles",
abstract = "Ligand-free naked and oleylamine-capped nickel nanoparticles (Ni NPs) were size-selectively prepared in the size ranges of 5-17 nm (naked) and 13-19 nm (capped) in diameter through gas- and liquid-phase syntheses, respectively. As for the magnetic properties of both the naked and oleylamine-capped Ni NPs, the blocking temperatures, TB, increase with the size, where TB for the naked Ni NPs are significantly higher than that for the capped Ni NPs. The results indicate that the ferromagnetic core region of Ni NPs is reduced by the formation of nonmagnetic layers at the surface of the capped NPs, where their thickness is estimated to be 1-2 nm.",
author = "Akinori Sugiyama and Yousuke Taguchi and Shuhei Nagaoka and Atsushi Nakajima",
year = "2010",
month = "1",
day = "18",
doi = "10.1016/j.cplett.2009.12.004",
language = "English",
volume = "485",
pages = "129--132",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Size-dependent magnetic properties of naked and ligand-capped nickel nanoparticles

AU - Sugiyama, Akinori

AU - Taguchi, Yousuke

AU - Nagaoka, Shuhei

AU - Nakajima, Atsushi

PY - 2010/1/18

Y1 - 2010/1/18

N2 - Ligand-free naked and oleylamine-capped nickel nanoparticles (Ni NPs) were size-selectively prepared in the size ranges of 5-17 nm (naked) and 13-19 nm (capped) in diameter through gas- and liquid-phase syntheses, respectively. As for the magnetic properties of both the naked and oleylamine-capped Ni NPs, the blocking temperatures, TB, increase with the size, where TB for the naked Ni NPs are significantly higher than that for the capped Ni NPs. The results indicate that the ferromagnetic core region of Ni NPs is reduced by the formation of nonmagnetic layers at the surface of the capped NPs, where their thickness is estimated to be 1-2 nm.

AB - Ligand-free naked and oleylamine-capped nickel nanoparticles (Ni NPs) were size-selectively prepared in the size ranges of 5-17 nm (naked) and 13-19 nm (capped) in diameter through gas- and liquid-phase syntheses, respectively. As for the magnetic properties of both the naked and oleylamine-capped Ni NPs, the blocking temperatures, TB, increase with the size, where TB for the naked Ni NPs are significantly higher than that for the capped Ni NPs. The results indicate that the ferromagnetic core region of Ni NPs is reduced by the formation of nonmagnetic layers at the surface of the capped NPs, where their thickness is estimated to be 1-2 nm.

UR - http://www.scopus.com/inward/record.url?scp=73149121601&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=73149121601&partnerID=8YFLogxK

U2 - 10.1016/j.cplett.2009.12.004

DO - 10.1016/j.cplett.2009.12.004

M3 - Article

AN - SCOPUS:73149121601

VL - 485

SP - 129

EP - 132

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 1-3

ER -