Sonochemical deposition of magnetite on silver nanocrystals

被引：19

作者：

Perkas, Nina ^{[1
,2
]}

Amirian, Galina ^{[1
,2
]}

Rottman, Claudio ^{[3
]}

de la Vega, Fernando ^{[3
]}

Gedanken, Aharon ^{[1
,2
]}

机构：

[1] Bar Ilan Univ, Dept Chem, Univ Ctr Adv Mat & Nanotechnol, IL-52900 Ramat Gan, Israel

[2] Bar Ilan Univ, Kanbar Lab Nanomat, Univ Ctr Adv Mat & Nanotechnol, IL-52900 Ramat Gan, Israel

[3] Clima NanoTech, IL-38900 Caesarea, Israel

来源：

ULTRASONICS SONOCHEMISTRY | 2009年 / 16卷 / 01期

关键词：

Silver nanoparticles; Magnetite; Sonochemical deposition; NANOPARTICLES; HETERODIMERS; FABRICATION; ULTRASOUND; SIZE;

D O I：

10.1016/j.ultsonch.2008.04.014

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Sonochemical irradiation of iron (II) acetate aqueous solution in presence of silver nanopowder resulted in deposition of magnetite nanoparticles on silver nanocrystals, and imparted them with magnetic properties. The Ag-Fe3O4 nanocomposite is well attracted to a permanent magnet, and demonstrates superparamagnetic behavior typical of nanomaterials in a magnetic field. The characterization of the product by X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR TEM), energy-dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS) reveal the presence of two phases of the silver and the magnetite, but no chemical interaction between them has been found. The strong anchoring of magnetite to the nanosilver surface was explained as a result of local melting of silver when the magnetite nucleus is thrown at the silver surface by high speed sonochemical microjets. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：132 / 135

页数：4

共 22 条

[1] Formation of a three-dimensional microstructure of Fe3O4-poly(vinyl alcohol) composite by evaporating the hydrosol under a magnetic field [J].