Permanent magnetism in thiol capped nanoparticles, gold and ZnO

被引：10

作者：

Crespo, P. ^{[1
,2
]}

Garcia, M. A. ^{[1
,2
]}

Fernandez-Pinel, E. ^{[1
,2
]}

De la Venta, J. ^{[1
,2
]}

Merino, J. M. ^{[1
,2
]}

Quesada, A. ^{[1
,2
]}

Hernando, A. ^{[1
,2
]}

Fernandez, A. ^{[3
,4
]}

Penades, S. ^{[5
]}

机构：

[1] CSIC, UCM, Inst Magnetismo Aplicado, POB 155, Madrid 28230, Spain

[2] UCM, Dept Fis Mat, Madrid 28040, Spain

[3] CSIC UNSE, Inst Ciencia Mat Sevilla, Seville 41092, Spain

[4] Univ Seville, Dept Quim Inorgan, Seville, Spain

[5] CSIC, Grp Carbohidratos, Lab Glyconanotechnol, IIQ, Seville 41092, Spain

来源：

ACTA PHYSICA POLONICA A | 2008年 / 113卷 / 01期

关键词：

D O I：

10.12693/APhysPolA.113.515

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In spite of the diamagnetic behavior exhibited by bulk ZnO and Au, a ferromagnetic-like behavior is induced in nanoparticles of both systems by appropriate surface functionalization. By capping with thiol derivatized molecules, magnetic hysteresis is observed even at room temperature, whereas the magnetization has a very little temperature dependence. Capping induces an alteration of their electronic configuration that depends on the capping molecule, as evidenced by X-ray absorption spectroscopy, that strongly affects their magnetic properties.

引用

页码：515 / 520

页数：6

共 14 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2]

BARRIENTOS AG, 2006, J PHYS CHEM-US, V110, P13021

[3]

BRUST M, J CHEM SOC CHEM COMM, V801, P94

[4] Gold nanoclusters reductively deposited on porous silicon: morphology and electronic structures [J].

Coulthard, I ;

Degen, S ;

Zhu, YJ ;

Sham, TK .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1998, 76 (11) :1707-1716

[5] Fe impurities weaken the ferromagnetic behavior in Au nanoparticles [J].

Crespo, P. ;

Garcia, M. A. ;

Fernandez Pinel, E. ;

Multigner, M. ;

Alcantara, D. ;

de la Fuente, J. M. ;

Penades, S. ;

Hernando, A. .

PHYSICAL REVIEW LETTERS, 2006, 97 (17)

[6] Permanent magnetism, magnetic anisotropy, and hysteresis of thiol-capped gold nanoparticles -: art. no. 087204 [J].

Crespo, P ;

Litrán, R ;

Rojas, TC ;

Multigner, M ;

de la Fuente, JM ;

Sánchez-López, JC ;

García, MA ;

Hernando, A ;

Penadés, S ;

Fernández, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (08) :087204-1

[7] Induced magnetic ordering by proton irradiation in graphite -: art. no. 227201 [J].

Esquinazi, P ;

Spemann, D ;

Höhne, R ;

Setzer, A ;

Han, KH ;

Butz, T .

PHYSICAL REVIEW LETTERS, 2003, 91 (22)

[8] Giant magnetic anisotropy of single cobalt atoms and nanoparticles [J].

Gambardella, P ;

Rusponi, S ;

Veronese, M ;

Dhesi, SS ;

Grazioli, C ;

Dallmeyer, A ;

Cabria, I ;

Zeller, R ;

Dederichs, PH ;

Kern, K ;

Carbone, C ;

Brune, H .

SCIENCE, 2003, 300 (5622) :1130-1133

[9]

Garcia MA, 2007, NANO LETT, V7, P1489, DOI 10.1021/nl070198m

[10] Surface plasmon resonance of capped Au nanoparticles -: art. no. 241403 [J].

Garcia, MA ;

de la Venta, J ;

Crespo, P ;

LLopis, J ;

Penadés, S ;

Fernández, A ;

Hernando, A .

PHYSICAL REVIEW B, 2005, 72 (24)

← 1 2 →