Chemically induced permanent magnetism in Au, Ag, and Cu nanoparticles: Localization of the magnetism by element selective techniques

被引：197

作者：

Garitaonandia, Jose S. ^{[1
]}

Insausti, Maite ^{[1
]}

Goikolea, Eider ^{[1
]}

Suzuki, Motohiro ^{[2
]}

Cashion, John D. ^{[3
]}

Kawamura, Naomi ^{[2
]}

Ohsawa, Hitoshi ^{[2
]}

Gil de Muro, Izaskun ^{[1
]}

Suzuki, Kiyonori ^{[4
]}

Plazaola, Fernando ^{[1
]}

Rojo, Teofilo ^{[1
]}

机构：

[1] Euskal Herriko Unibertsitatea, Zientzia Eta Teknol Fak, Bilbao 48820, Spain

[2] JASRI, Spring 8, Mikazuki, Sayou 6795198, Japan

[3] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia

[4] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

来源：

NANO LETTERS | 2008年 / 8卷 / 02期

关键词：

SELF-ASSEMBLED MONOLAYERS; RAY CIRCULAR-DICHROISM; GOLD NANOPARTICLES; CLUSTER COMPOUNDS; MOSSBAUER; AU-197;

D O I：

10.1021/nl073129g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a direct observation of the intrinsic magnetization behavior of Au in thiol-capped gold nanoparticles with permanent magnetism at room temperature. Two element specific techniques have been used for this purpose: X-ray magnetic circular dichroism on the L edges of the Au and Au-197 Mossbauer spectroscopy. Besides, we show that silver and copper nanoparticles synthesized by the same chemical procedure also present room-temperature permanent magnetism. The observed permanent magnetism at room temperature in Ag and Cu dodecanethiol-capped nanoparticles proves that the physical mechanisms associated to this magnetization process can be extended to more elements, opening the way to new and still not-discovered applications and to new possibilities to research basic questions of magnetism.

引用

页码：661 / 667

页数：7

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