Magnetic nanowire-enhanced optomagnetic tweezers

We present an optomagnetic tweezers technique that utilizes the highly localized magnetic field gradients generated near the tip of a magnetic nanowire to provide strong trapping forces on magnetic nanoparticles with high spatial resolution. Integral to the approach is a method to trap, translate, a...

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Bibliographic Details
Published in2009 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems pp. 1004 - 1007
Main Authors Mehta, K.K., Ting-Hsiang Wu, Chiou, E.P.Y.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2009
Subjects
Biological processes
Biological system modeling
Magnetic fields
Magnetic particles
Magnetic tweezers
Nanobioscience
Nanoparticles
Nickel
Optical manipulation
Optical tweezers
Optoelectronic tweezers
Predictive models
Saturation magnetization
Spatial resolution
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Summary:We present an optomagnetic tweezers technique that utilizes the highly localized magnetic field gradients generated near the tip of a magnetic nanowire to provide strong trapping forces on magnetic nanoparticles with high spatial resolution. Integral to the approach is a method to trap, translate, and rotate a single magnetic nanowire in three dimensions; this nanowire is in turn capable of exerting forces on magnetic nanoparticles. Our simulation predicts that forces in the range of 100 pN can be generated on 200 nm magnetic particles within a distance of 0.3 mum from a 200 nm diameter nickel nanowire, magnetized to saturation. Such forces are relevant in many biological processes, suggesting this approach may be of value in biophysical studies.
ISBN:9781424446292
1424446295
DOI:10.1109/NEMS.2009.5068743