Scanning probe microscopy on magnetic colloidal particles

We report some first results on magnetite and iron nanoparticles studied with atomic force microscopy (AFM). AFM images the particles on a smooth substrate, and their lateral diameter, height and polydispersity are determined and discussed. The use of magnetic force microscopy (MFM) on such small pa...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 252; no. 1-3; pp. 101 - 103
Main Authors Raşa, M., Philipse, A.P.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.11.2002
Elsevier Science
Subjects
Atomic force microscopy
Colloidal nanoparticles
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism and paramagnetism
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Granulometry
Magnetic force microscopy
Magnetic properties and materials
Physics
Atomic force microscopy
Colloidal nanoparticles
Magnetic force microscopy
Granulometry
Inorganic compounds
Colloids
Transition element compounds
Magnetic moments
Iron
Superparamagnetism
Experimental study
Nanoparticles
Magnetic particles
Magnetite
Fine particle
Transition elements
Iron oxides
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Summary:We report some first results on magnetite and iron nanoparticles studied with atomic force microscopy (AFM). AFM images the particles on a smooth substrate, and their lateral diameter, height and polydispersity are determined and discussed. The use of magnetic force microscopy (MFM) on such small particles is explored both experimentally and theoretically. We present models which allow to estimate with MFM the magnetic moment of a single superparamagnetic nanosphere, which cannot be done with other techniques.
ISSN:0304-8853
DOI:10.1016/S0304-8853(02)00643-1