1. Application of atomic magnetometry in magnetic particle detection.
- Author
-
Xu, S., Donaldson, M. H., Pines, A., Rochester, S. M., Budker, D., and Yashchuk, V. V.
- Subjects
MAGNETOMETERS ,POSITION sensitive particle detectors ,COBALT compounds ,NANOPARTICLES ,FERROMAGNETIC materials ,CELL separation - Abstract
The authors demonstrate the detection of magnetic particles carried by water in a continuous flow using an atomic magnetic gradiometer. Studies on three types of magnetic particles are presented: a single cobalt particle (diameter ∼150 μm, multidomain), a suspension of superparamagnetic magnetite particles (diameter ∼1 μm), and ferromagnetic cobalt nanoparticles (diameter ∼10 nm). Estimated detection limits are 20 μm diameter for a single cobalt particle at a water flow rate of 30 ml/min, 5×10
3 magnetite particles at 160 ml/min, and 50 pl for the ferromagnetic fluid of cobalt nanoparticles at 130 ml/min. Possible applications of their method are discussed. [ABSTRACT FROM AUTHOR]- Published
- 2006
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