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Photosensitive biosensor array system using optical addressing without an addressing circuit on array biochips

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7 Author(s)
Ahn, Chang-Geun ; Biosensor Team, BT Convergence Technology Research Department, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, Republic of Korea ; Ah, Chil Seong ; Kim, Tae-Youb ; Park, Chan Woo
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This paper introduces a photosensitive biosensor array system with a simple photodiode array that detects photocurrent changes caused by reactions between probe and target molecules. Using optical addressing, the addressing circuit on the array chip is removed for low-cost application, and real cell addressing is achieved using an externally located computer-controllable light-emitting diode array module. The fabricated biosensor array chip shows a good dynamic range of 1–100 ng/mL under prostate-specific antigen detection, with an on-chip resolution of roughly 1 ng/mL.

Published in:

Applied Physics Letters  (Volume:97 ,  Issue: 10 )

Date of Publication:

Sep 2010

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