Chip-scale magnetic sensing and control of nanoparticles and nanorods

We report on a system designed for the magnetic control of nanoparticles and nanorods. This is accomplished by arrays of current-carrying wires (electromagnets) and the associated control circuitry onto a single chip. The chip serves both as the source of localized programmable magnetic fields and the substrate on which the nanostructures rest. Sensing can be similarly performed through on-chip electromagnetic or optical measurements. As proof of concept, we utilize the catalysis of hydrogen-peroxide decomposition by platinum to propel hybrid nanorods through a fluid medium, and demonstrate basic control of nanoparticles in response to the applied currents (electromagnetic fields)