Title :
Magnetic nanowire-enhanced optomagnetic tweezers
Author :
Mehta, Krunal K. ; Ting-Hsiang Wu ; Chiou, Eric P Y
Author_Institution :
Dept. of Electr. Eng., UCLA, Los Angeles, CA
Abstract :
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.
Keywords :
magneto-optical devices; nanoparticles; nanowires; nickel; optoelectronic devices; radiation pressure; Ni; magnetic nanoparticles; magnetic nanowire; optomagnetic tweezers; size 200 nm; Biological processes; Biological system modeling; Magnetic fields; Magnetic particles; Nanobioscience; Nanoparticles; Nickel; Predictive models; Saturation magnetization; Spatial resolution; Magnetic tweezers; Optical manipulation; Optical tweezers; Optoelectronic tweezers;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2009. NEMS 2009. 4th IEEE International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-4629-2
Electronic_ISBN :
978-1-4244-4630-8
DOI :
10.1109/NEMS.2009.5068743
