| The objective of thesis is to design magnetic sensor for detection of nanoparticles. Recently integrating the standard laboratory techniques into integrated system on chip is growing attention. Recent development is to combine magnetic markers and magnetoresistive sensors together in magnetic chip. In this thesis two magnetoresistive sensors were studied and designed.;By applying magnetic fields, magnetic nanoparticles can be manipulated on-chip, which can be utilized to pull the molecules to specific binding sites or to test the binding strength and distinguish between specifically and non-specifically bound molecules.;Magnetoresistive sensors are compatible with the semiconductor industry which provides electronic signal directly as the output. Giantmagnetoresistive senor are based on change in resistance due to the magnetization of electron where as Tunneling device uses the probability of an electron to cross the oxide barrier. |
