Transport and detection of superparamagnetic particles by nanowire
AssigneeMassachusetts Institute of Technology
InventorsGeoffrey Stephen Beach, Elizabeth Ashera Rapoport
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Abstract
An apparatus, method and computer-readable medium configured to transport a constituent of fluid sample that binds to a functionalized magnetic particle. The apparatus includes a substrate connected to an input port, a magnetic nanowire, and either a temporally changing magnetic field generator or a spin-polarized current source. The magnetic nanowire is disposed in a surface of the substrate. The width and thickness of the magnetic nanowire are configured so that a domain wall propagating along the nanowire in response to the temporally changing magnetic field continuously couples to a superparamagnetic particle introduced into the input port.
Claims20
An apparatus comprising:
- a substrate connected to an input port;
- a magnetic nanowire disposed in a surface of the substrate;
- and
- a temporally changing magnetic field generator configured to generate a temporally changing magnetic field,
- wherein the width and thickness of the magnetic nanowire are configured so that a domain wall propagating along the nanowire in response to the temporally changing magnetic field continuously couples to a superparamagnetic particle introduced into the input port.
An apparatus comprising:
- a substrate connected to an input port;
- a magnetic nanowire disposed in a surface of the substrate;
- and
- an electric current source configured to generate a spin-polarized electric current,
- wherein the width and thickness of the magnetic nanowire are configured so that a domain wall propagating along the nanowire in response to the spin-polarized electric current continuously couples to a superparamagnetic particle introduced into the input port.
A method comprising:
- introducing a fluid sample with a contacted functionalized superparamagnetic particle into an apparatus comprising a magnetic nanowire disposed in a surface of a substrate and temporally changing magnetic field generator;
- inducing a domain wall that propagates along the nanowire;
A method comprising:
- introducing a fluid sample with a contacted functionalized superparamagnetic particle into an apparatus comprising a magnetic nanowire disposed in a surface of a substrate and spin-polarized electric current source;
- inducing a domain wall that propagates along the nanowire;
Dependencies are inferred from the claim text.