Abstract: This disclosure provides systems, methods, and apparatus related to nanostructures. In one aspect, an array of nanowires is provided. The array of nanowires comprises a plurality of nanowires. End of nanowires of the plurality of nanowires are attached to a substrate. A liquid including a plurality of nanoparticles is deposited on the array of nanowires. The liquid is evaporated from the array of nanowires. Nanoparticles of the plurality of nanoparticles are deposited on the nanowires as a meniscus of the liquid recedes along lengths of the plurality of nanowires.

Abstract: This disclosure provides systems, methods, and apparatus related to nanostructures. In one aspect, an array of nanowires is provided. The array of nanowires comprises a plurality of nanowires. End of nanowires of the plurality of nanowires are attached to a substrate. A liquid including a plurality of nanoparticles is deposited on the array of nanowires. The liquid is evaporated from the array of nanowires. Nanoparticles of the plurality of nanoparticles are deposited on the nanowires as a meniscus of the liquid recedes along lengths of the plurality of nanowires.

Abstract: A magnetic sensor apparatus includes a substrate, a plurality of magnetoresistance sensor units, a reset coil and a compensation coil. The magnetoresistance sensor units are disposed on the substrate. The reset coil is disposed over the magnetoresistance sensor units for introducing a resetting current, and a magnetic field generated from this resetting current can be used to reset magnetization directions of the magnetoresistance sensor units. The reset coil includes a plurality of first main segments. The compensation coil is disposed over the magnetoresistance sensor units for introducing a compensating current, and another magnetic field generated from the compensating current is used as a compensation magnetic field onto the magnetoresistance sensor units. The compensation coil includes a plurality of second main segments. The first main segments of the reset coil are perpendicular to the second main segments of the compensation coil.

Abstract: A magnetic sensor apparatus includes a substrate, a plurality of magnetoresistance sensor units, a compensation coil and a reset coil. The magnetoresistance sensor units are disposed on the substrate. The compensation coil is disposed over the magnetoresistance sensor units. The compensation coil is used for introducing a compensating current. The reset coil is disposed over the magnetoresistance sensor units. The reset coil is used for introducing a resetting current. The resetting current is used for resetting the magnetoresistance sensor units. The reset coil has a plurality of notch structures located at turning portions of the reset coil.

Abstract: A magnetic sensor apparatus includes a substrate, a plurality of magnetoresistance sensor units, a reset coil and a compensation coil. The magnetoresistance sensor units are disposed on the substrate. The reset coil is disposed over the magnetoresistance sensor units. The reset coil is used for introducing a resetting current. The compensation coil is disposed over the magnetoresistance sensor units. The compensation coil is used for introducing a compensating current. A wiring pattern of the compensation coil includes a first spiral portion and a second spiral portion in opposite spiral directions.