title: Optical Addressing Electronic Tongue Based on Low Selective Photovoltaic Transducer with Nanoporous Silicon Layer.
abstract: The electronic tongue based on the array of low selective photovoltaic (PV) sensors and principal component analysis is proposed for detection of various alcohol solutions. A sensor array is created at the forming of p-n junction on silicon wafer with porous silicon layer on the opposite side. A dynamical set of sensors is formed due to the inhomogeneous distribution of the surface recombination rate at this porous silicon side. The sensitive to molecular adsorption photocurrent is induced at the scanning of this side by laser beam. Water, ethanol, iso-propanol, and their mixtures were selected for testing. It is shown that the use of the random dispersion of surface recombination rates on different spots of the rear side of p-n junction and principal component analysis of PV signals allows identifying mentioned liquid substances and their mixtures.
authors.affiliation: Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64, Volodymyrs'ka St., 01601, Kyiv, Ukraine. litvin@univ.kiev.ua.
authors.forename: S V
authors.initials: SV
authors.lastname: Litvinenko
authors.affiliation: Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64, Volodymyrs'ka St., 01601, Kyiv, Ukraine.
authors.forename: D O
authors.initials: DO
authors.lastname: Bielobrov
authors.affiliation: Nanotechnology Institute of Lyon (INL) UMR 5270, CNRS, INSA, University of Lyon, Lyon, Villeurbanne, 69621, France.
authors.forename: V
authors.initials: V
authors.lastname: Lysenko
authors.affiliation: Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64, Volodymyrs'ka St., 01601, Kyiv, Ukraine.
authors.forename: V A
authors.initials: VA
authors.lastname: Skryshevsky
keywords: Electronic tongue; Photovoltaic transducer; Porous silicon; Principal component analysis