Structure, morphology, and aging of Ag-Fe dumbbell nanoparticles

被引：21

作者：

Elsukova, Anna ^{[1
,2
]}

Li, Zi-An ^{[1
,2
]}

Moeller, Christina ^{[1
,2
]}

Spasova, Marina ^{[1
,2
]}

Acet, Mehmet ^{[1
,2
]}

Farle, Michael ^{[1
,2
]}

Kawasaki, Masahiro ^{[3
]}

Ercius, Peter ^{[4
]}

Duden, Thomas ^{[4
]}

机构：

[1] Univ Duisburg Essen, Expt Phys AG Farle, Lotharstr 1, D-47057 Duisburg, Germany

[2] Univ Duisburg Essen, CENIDE, D-47057 Duisburg, Germany

[3] Jeol Inc, Peabody, MA 01960 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2011年 / 208卷 / 10期

关键词：

dumbbell nanoparticles; Fe-Ag nanoparticles; structural properties; TEM; OXIDATION; GROWTH; AG/FE;

D O I：

10.1002/pssa.201127104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dumbbell-shaped or Janus-type nanocomposites provide multifunctional properties with various diagnostic and therapeutic applications in biomedicine. We have prepared dumbbell Ag-Fe nanoparticles by magnetron sputtering with subsequent in-flight annealing. Structural properties and chemical compositions of freshly prepared and 5-month aged particles were examined by means of transmission electron microscopy including high-resolution imaging, energy dispersive X-ray spectroscopy, and 3D electron tomography. Fresh particles consist of a faceted Ag part on a Fe-Fe3O4 composite particle of more spherical shape. Aging changes the crystallinity and morphology of the particles. The aged nanocomposite consists of a silver spherical particle that is attached to a hollow iron oxide sphere containing one or several silver clusters inside. [GRAPHICS] (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2437 / 2442

页数：6

共 23 条

[11] Design and synthesis of Janus micro- and nanoparticles [J].