Method and arrangement for detecting changes of a magnetic response in magnetic particles

A method for detecting changes of magnetic response of at least one magnetic particle provided with a external layer in a carrier fluid, comprising measuring the characteristic rotation time of the magnetic particle with respect to the external layer, and measuring Brownian relaxation in the carrier...

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Bibliographische Detailangaben
Hauptverfasser:	MINCHOLE ANA, ASTALAN ANDREA P, JOHANSSON CHRISTER, KROZER ANATOL, LAGERWALL-LARSSON KERSTIN
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MANUFACTURE OR TREATMENT OF NANOSTRUCTURES MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES NANOTECHNOLOGY PERFORMING OPERATIONS PHYSICS SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for detecting changes of magnetic response of at least one magnetic particle provided with a external layer in a carrier fluid, comprising measuring the characteristic rotation time of the magnetic particle with respect to the external layer, and measuring Brownian relaxation in the carrier fluid under the influence of an external alternating magnetic field. The method implies that upon modification of the effective volume of the particle or its interaction with the carrier fluid, a hydrodynamic volume of the particle changes, which implies a change of the frequency (fmax) at which an out of phase component of the magnetic susceptibility has its maximum.