Diode/magnetic tunnel junction cell for fully scalable matrix-based biochip

Cardoso F.A., Ferreira H.A., Conde J.P., Chu V., Freitas P.P., Vidal D., Germano J., Sousa L., Piedade M.S., Costa B.A., Lemos J.M.
INESC-Microsystems and Nanotechnologies, Rua Alves Redol 9, 1000-029 Lisbon, Portugal

Abstract: Magnetoresistive biochips have been recently introduced for the detection of biomolecular recognition. In this work, the detection site incorporates a thin-film diode in series with a magnetic tunnel junction (MTJ), leading to a matrix-based biochip that can be easily scaled up to screen large numbers of different target analytes. The fabricated 16×16 cell matrix integrates hydrogenated amorphous silicon (a-Si:H) diodes with aluminum oxide barrier MTJ. Each detection site also includes a U-shaped current line for magnetically assisted target concentration at probe sites. The biochip is being integrated in a portable, credit card size electronics control platform. Detection of 250 nm diameter magnetic nanoparticles by one of the matrix cells is demonstrated. © 2006 American Institute of Physics.

Year: 2006
Source title: Journal of Applied Physics
Volume: 99
Issue: 8
Art. No.: 08B307
Cited by: 6
Link: Scorpus Link
Document Type: Article
Source: Scopus
Authors with affiliations:

1. Cardoso, F.A.
2. Ferreira, H.A.
3. Conde, J.P.
4. Chu, V., INESC-Microsystems and Nanotechnologies, Rua Alves Redol 9, 1000-029 Lisbon, Portugal
5. Freitas, P.P.
6. Vidal, D.
7. Germano, J.
8. Sousa, L.
9. Piedade, M.S.
10. Costa, B.A.
11. Lemos, J.M.

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