The invention is directed to hydrophilic and hydrophobic superparamagnetic nanoparticles and their use as contrast agents for NMR including agents that distinguish oil and water in NMR logging of geological formations containing oil or water. Methods of making these SPIONs are also described.

An electromagnetic sensor for use in a variety of applications requiring extremely high sensitivity, such as measuring power and characteristics of incident electromagnetic radiation includes a superconducting layer that carries an exchange field for providing a spin splitting effect of charge carriers in the superconducting layer, a metal electrode, and an insulating layer arranged between the superconducting layer and metal electrode to form a spin filter junction therebetween. The electromagnetic sensor provides an antenna including a wave collecting element, in contact with the superconducting layer to convey thereinto external electromagnetic waves that are generated by an external source. An electric measurement device provides an output signal responsive to the amplitude and frequency of the external electromagnetic waves, and contacts the metal electrode to measure an electric current or voltage caused by the spin splitted charge carrier flow from the superconducting layer through the spin filter junction into the metal electrode.

A method of manufacturing a magnetic wire example includes depositing a magnetic film, which has a composition that enables measuring motion of a magnetic domain wall in the magnetic film, on/above a silicon substrate, forming the magnetic film on the silicon substrate on which the magnetic film is deposited using a wire pattern and an electrode pattern of a certain specification, shielding a central part of the magnetic wire in a photolithography method by an edge milling pattern which corresponds to a predetermined specification, and ablating an edge portion of the magnetic wire which is not shielded by an ion milling.

The present invention provides a method for producing a magnetic nanoparticle-coated laminate material. The method comprises coating a pair of opposed surfaces of a plurality of steel or iron/cobalt (Fe/Co) alloy film portions with a magnetic nanoparticle-containing coating. Each magnetic nanoparticle comprises a core and a shell covering at least a portion of the core. The shell and core are made of different materials selected from one or more of: iron, cobalt, nickel; and/or alloys comprising two or more of: iron, cobalt and/or nickel; and/or magnetic rare earth metals; and/or diamagnetic transition metals. The method further comprises stacking the coated film portions on top of each other such that a or each coated surface of each film portion is located adjacent a further coated surface of an adjacent film portion; and compressing the stacked coated film portions together to form a nanoparticle-coated laminate material.

Superparamagnetic nanocomposites are provided. In an embodiment, a superparamagnetic nanocomposite comprises a superparamagnetic core comprising a first, soft superparamagnetic ferrite and a superparamagnetic shell comprising a second, soft superparamagnetic ferrite, the shell formed over the core, wherein the first and second soft superparamagnetic ferrites are different compounds and have different magnetocrystalline anisotropies.

The present invention relates to a soft robot using diamagnetic levitation. Such a soft robot using diamagnetic levitation is formed of a diamagnetic material to levitate on the ground on which a magnetic field is formed, and moves in a direction toward a predetermined point of a head part when the predetermined point of the head part is heated, and may thus move and change its direction in a state in which it is not in contact with the ground.

A magnetic member for attachment to a surface has a first layer of material connected to a second layer of material and a plurality of spaced metal strips or metal particles are disposed between the first and second layers of material. The spaced metal strips or metal particles are adapted to magnetically attract a magnetic material attached to an object.

A capsule is disclosed which includes a flexible outer shell capable of transforming into an asymmetric shape; an internal medium encapsulated by the outer shell, the medium including a plurality of magnetic particles, wherein the magnetic particles can move in response to an applied magnetic field. A valve system includes an in-line valve sized to fit within a flow channel including a capsule having a flexible outer shell containing an internal medium encapsulated by the outer shell, the medium including a plurality of magnetic particles; and a magnetic field source disposed about the exterior wall of the channel.

An electromagnetic sensor for use in a variety of applications requiring extremely high sensitivity, such as measuring power and characteristics of incident electromagnetic radiation includes a superconducting layer that carries an exchange field for providing a spin splitting effect of charge carriers in the superconducting layer, a metal electrode, and an insulating layer arranged between the superconducting layer and metal electrode to form a spin filter junction therebetween. The electromagnetic sensor provides an antenna including a wave collecting element, in contact with the superconducting layer to convey thereinto external electromagnetic waves that are generated by an external source. An electric measurement device provides an output signal responsive to the amplitude and frequency of the external electromagnetic waves, and contacts the metal electrode to measure an electric current or voltage caused by the spin splitted charge carrier flow from the superconducting layer through the spin filter junction into the metal electrode.

An inductive sensor includes a core body, a coil wound on the core body, a cavity having a fixed volume within the core body, and an epoxy mixture filling a controlled portion of the fixed volume. The controlled portion of the fixed volume filled with the epoxy mixture controls an inductance of the sensor.