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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Bajaj, B. Thanh, N.T. Kim, C.G. |
| Copyright Year | 2007 |
| Description | Author affiliation: Dept. of Mater. Sci. & Eng., Chungnam Nat. Univ., Daejeon (Bajaj, B.; Thanh, N.T.; Kim, C.G.) |
| Abstract | There is a considerable effort directed towards understanding and negating the proliferation of infectious diseases by improving the sensitivity of biosensors. We describe the investigation of nucleic acid interactions based on immobilization of thiolated probe DNA followed by the coupling of biotinylated DNA and streptavidin coated Dyna beads on the gold film deposited on the substrate for the further application with the Planar Hall effect in spin valve structure of Ta/NiFe/Cu/NiFe/IrMn/Ta which has been applied to single magnetic bead detection sensor with the size of 3times3 $mum^{2}.$ The spin valve structure which incorporates free and pinned layers was used as magnetic field sensor based on the resistance changes when the magnetization orientation in free magnetic layer rotates to the change of external applied magnetic field. It is demonstrated to induce a high sensitivity due to small interlayer coupling between free and pinned layers, and improved signal-to-noise due to very thin active sensing layer; compared to the other structures. . In the results, the sensor performance with single $Dynabeads^{reg}$ M-280 Streptavidin conjugated with target DNA and probe DNA was reported as a significantly sensitive system with high signals of around 1.4 muV. These, therefore, can be used well for biomolecule recognition , biotechnology and biosensor application. |
| Starting Page | 1033 |
| Ending Page | 1036 |
| File Size | 896387 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424406074 |
| DOI | 10.1109/NANO.2007.4601359 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-08-02 |
| Publisher Place | Hong Kong |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Magnetic resonance imaging DNA Magnetic anisotropy Perpendicular magnetic anisotropy Spin valves Probes Magnetic fields Dynabead Bio sensor magnetic bead detection |
| Content Type | Text |
| Resource Type | Article |
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