Spintronic Biosensors
Biosensors are devices to detect biological or chemical materials using a sensor system containing a biological component. NVE
has developed biosensor technology using its proprietary spintronic materials. Applications include ultra-miniature biological warfare agent detectors, clinical diagnostic instruments, and laboratory-on-a-chip diagnostic systems. NVE biosensors have been independently tested, and has announced a customer that plans to use the technology in a clinical diagnostic instrument.
Several spintronic biosensor configurations have been identified. In the configuration illustrated at right, a magnetic biological marker nano-bead adheres to the immobilization surface when a targeted biological agent is present. The bead is separated from a spintronic sensor by a passivation layer as thin as 10 nanometers. The sensor uses either a Giant Magnetoresistor (GMR) or a Spin-Dependent Tunnel (SDT) Junction to detect a small perturbation in the magnetic field caused by adhering beads. |