论文部分内容阅读
The structure and microfabrication,the detecting theory and the way of biomolecular recognition device based on giant magnetoresistance(GMR) effect are introduced,also the signal detecting and processing instrumentation are presented. Here the GMR biosensor was fabricated with magnetic tunnel junction(MJT) material.The biomolecular recognition device contains an array of MJT sensors,single MJT sensor size is 10μm×20μm,tunneling magnetoresistance ratio(TMR) at room temperature is 52.2%,the typical values of junction resistance-area product Rs is 2.6 kΩμm~2,detecting sensitivity of this system is about 8×10~(-4) A·m~(-1).Bioadaptation layer of this device was fabricated with PDMS the thickness of which is less than 100 nm.
The structure and microfabrication, the detecting theory and the way of biomolecular recognition device based on giant magnetoresistance (GMR) effect are presented, also the signal detecting and processing instrumentation are presented. Here the GMR biosensor was fabricated with magnetic tunnel junction (MJT) material The tunnel junction magnetoresistance ratio (TMR) at room temperature is 52.2%, and the typical values of junction resistance-area product Rs is 2.6 kΩμm ~ 2, the MJT sensor size is 10 μm × 20 μm, detection sensitivity of this system is about 8 × 10 -4 A · m -1. Bioadaptation layer of this device was fabricated with PDMS the thickness of which is less than 100 nm.