Magnetically induced microspinning for super-detection and super-characterization of biomarkers and live cells
First Claim
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1. A method of detecting a target, the method comprising:
- (a) contacting the target which is immobilized on a non-magnetic substrate particle with a plurality of magnetic particles under conditions in which the magnetic particles are capable of associating or complexing with the target, wherein the diameter of the one or more magnetic particles is smaller relative to the diameter of the non-magnetic substrate particle;
(b) applying a rotating magnetic field to the immobilized target which is associated or complexed with the magnetic particles; and
(c) detecting rotation in the magnetic field arising from association or complex formation of one or more of the magnetic particles associated or complexed with the immobilized target, wherein detection of rotation and/or rate of rotation of the target indicates presence of the target.
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Abstract
Identification, quantification and characterization of biological micro- and nano-systems is enabled by magnetically spinning these natural, non-magnetic systems with the aid of induced magnetization. Biofriendly magnetic micro- and nano-labels enable magnetorotation in extremely weak electromagnetic fields. The spinning of these micromotors can be observed by a simple, CD-like, optical tracking system. The spinning frequency response enables real-time monitoring of single (cancer) cell morphology, with sub-microscopic resolution, yielding previously undeterminable information. Likewise, it enables super-low detection limits for any (cancer) biomarker.
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Citations
25 Claims
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1. A method of detecting a target, the method comprising:
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(a) contacting the target which is immobilized on a non-magnetic substrate particle with a plurality of magnetic particles under conditions in which the magnetic particles are capable of associating or complexing with the target, wherein the diameter of the one or more magnetic particles is smaller relative to the diameter of the non-magnetic substrate particle; (b) applying a rotating magnetic field to the immobilized target which is associated or complexed with the magnetic particles; and (c) detecting rotation in the magnetic field arising from association or complex formation of one or more of the magnetic particles associated or complexed with the immobilized target, wherein detection of rotation and/or rate of rotation of the target indicates presence of the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification