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Proceedings Paper

An alternative system for mycotoxin detection based on amorphous silicon sensors
Author(s): D. Caputo; G. de Cesare; P. De Rossi; C. Fanelli; A. Nascetti; A. Ricelli; R. Scipinotti
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Paper Abstract

In this work we investigate, for the first time, the performances of a system based on hydrogenated amorphous silicon photosensors for the detection of Ochratoxin A. The sensor is a n-type/intrinsic/p-type amorphous silicon stacked structure deposited on a glass substrate. The mycotoxin is deposited on a thin layer chromatographic plate and aligned with the sensor. An ultraviolet radiation excites the ochratoxin A, whose fluorescence produces a photocurrent in the sensor. The photocurrent value is proportional to the deposited mycotoxin quantity. An excellent linearity of the detector response over more than two orders of magnitude of ochratoxin A amount is observed. The minimum detected mycotoxin quantity is equal to 0.1ng, suggesting that the presented detection system could be a good candidate to perform rapid and analytical ochratoxin A analysis in different kind of samples.

Paper Details

Date Published: 15 May 2007
PDF: 6 pages
Proc. SPIE 6589, Smart Sensors, Actuators, and MEMS III, 65891F (15 May 2007); doi: 10.1117/12.721931
Show Author Affiliations
D. Caputo, Univ. La Sapienza (Italy)
G. de Cesare, Univ. La Sapienza (Italy)
P. De Rossi, Univ. La Sapienza (Italy)
C. Fanelli, Univ. La Sapienza (Italy)
A. Nascetti, Univ. La Sapienza (Italy)
A. Ricelli, CNR, Institute of Science of Food Production (Italy)
R. Scipinotti, Univ. La Sapienza (Italy)

Published in SPIE Proceedings Vol. 6589:
Smart Sensors, Actuators, and MEMS III
Thomas Becker; Carles Cané; N. Scott Barker, Editor(s)

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