26 Citations (Scopus)


In this paper we report on the fabrication and performance of a portable and low cost optoelectronic platform integrating a double color tuned light emitting diode as light source, an amorphous/nanocrystalline silicon photodetector with a flat spectral response in the wavelength range from 520nm to 630nm and integrated electronic for signal acquisition and conditioning constituted by current to voltage converter, a filter and an amplification stage, followed by an analog to digital converter, with appropriate software for full automation to minimize human error. Incorporation of the double color tuned light emitting diode provides for a simple yet innovative solution to signal acquisition independently from the light intensity and/or solution concentration, while considerably decreasing production costs. Detection based on Au-nanoprobes constitutes the biorecognition step and allowed identification of specific sequences ofMycobacterium tuberculosiscomplex, namelyMycobacterium bovisandM. tuberculosisin biological samples.
Original languageUnknown
Pages (from-to)2012-2017
JournalBiosensors & Bioelectronics
Issue number5
Publication statusPublished - 1 Jan 2011

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