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On-chip Detection of Chemiluminescent Biomolecules Using an Integrated Thin Film Silicon Photodiode

Published online by Cambridge University Press:  01 February 2011

A. Pereira
Affiliation:
[email protected], INESC-MN, -, Rua Alves Redol, 9, Lisbon, 1000-029, Portugal
A. Pimentel
Affiliation:
[email protected], INESC-MN, Rua Alves Redol, 9, Lisbon, 1000-029, Portugal
V. Chu
Affiliation:
[email protected], INESC-MN, Rua Alves Redol, 9, Lisbon, 1000-029, Portugal
D. M. F. Prazeres
Affiliation:
[email protected], Instituto Superior Técnico, Centro de Engenharia Biológica e Química, Lisbon, 1049-001, Portugal
J. P. Conde
Affiliation:
[email protected], INESC-MN, Rua Alves Redol, 9, Lisbon, 1000-029, Portugal
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Abstract

A hydrogenated amorphous silicon photodetector on a glass substrate is used for the integrated, real-time detection of chemiluminescent reactions in solution. The light emission at 425 nm resulting from the horseradish peroxidase-catalyzed oxidation of luminol is detected by a p-i-n amorphous silicon photodiode operated at zero bias. The limit of detection of the present device is in the range of nanomole of horseradish peroxidase per liter.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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