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Alexander V. Ivanov, Nataliya N. Zamyatina, Ivan S. Shchemelev, Klim E. Veliev, Patimat M. Kamilova, Oleg I. Kirilov
Digital colorimetric response of photonic crystal sensor
matrices: selection of measurement conditions
Abstract
Abstract. For the
first time, the digital colorimetry method using a consumer device (a
smartphone camera) has been applied to measure the characteristics of photonic
crystal sensor matrices. The sensor matrices consist of an array of polystyrene
spheres (with an average diameter of 190, 250, and 280 nm), covered with a
layer of polydimethylsiloxane, on carrier substrates made of polycarbonate and
polyethylene terephthalate. The conditions and parameters of photography have
been found to provide the most stable and intense analytical signal in RGB
coordinates for photonic crystal matrices of violet, green, and red initial
colors. The possibility of measuring the color coordinates and the integral
length of the Ar vector of a sensor matrix, which changes when exposed to
volatile organic compounds (such as hexane vapor), has been demonstrated.
Key words: photonic
crystal sensor arrays, digital colorimetry, analytical signal, RGB channels
Copyright (C) Chemistry Dept., Moscow State University, 2002
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