Single-step nanoengineering of silica coated maghemite hollow spheres withtunable magnetic properties

Authors
Tartaj, P Gonzalez-Carreno, T Serna, CJ
Citation
P. Tartaj et al., Single-step nanoengineering of silica coated maghemite hollow spheres withtunable magnetic properties, ADVAN MATER, 13(21), 2001, pp. 1620
Citations number
23
Categorie Soggetti
Multidisciplinary,"Material Science & Engineering
Journal title
ADVANCED MATERIALS
ISSN journal
09359648 → ACNP
Volume
13
Issue
21
Year of publication
2001
Database
ISI
SICI code
0935-9648(20011102)13:21<1620:SNOSCM>2.0.ZU;2-B
Abstract
Tunable magnetic hollow spheres of gamma -Fe2O3 with a silica-enriched surf ace layer have been synthesized by aerosol pyrolysis of an iron ammonium ci trate/TEOS solution in methanol. Careful temperature control is crucial for an optimum yield of intact spheres. The Figure shows a TEM image of a sphe re, revealing the outer layer consisting mainly of silica. The material is potentially interesting for magnetic-fluid applications, e.g., in medicine.