Optical sensors based on image acquisition hardware represent a promising technique to measure the chemical composition of an environment or the headspace generated by complex samples. However, this approach is still limited by the fact that only a restricted kind of interactions may change the visible spectrum of an indicator. As a consequence, the receptive field, namely the amount of different chemicals that can be captured by an opto-chemical sensor, is rather restricted. To extend the application of optical indicators we propose to use blends of porphyrins and acid-base indicators as materials for opto-chemical sensors. A suitable choice of the components allows to obtain sensing features that are not correlated to those of the single constituents. This strategy provides a straightforward method to develop sensor arrays for a wide number of practical applications, among them it is investigated here the measure of emissions from human skin. © 2012 The Authors. Published by Elsevier Ltd.
Indicators blends extend the receptive field of colorimetric chemical sensors / Dini, Francesca; Magna, Gabriele; Martinelli, Eugenio; Pomarico, Giuseppe; Paolesse, Roberto; Lundstrom, Ingemar; Di Natale, Corrado. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 47:(2012), pp. 1189-1190. (Intervento presentato al convegno EUROSENSORS 2012 tenutosi a Krakow, Poland) [10.1016/j.proeng.2012.09.364].
Indicators blends extend the receptive field of colorimetric chemical sensors
Pomarico, Giuseppe;
2012
Abstract
Optical sensors based on image acquisition hardware represent a promising technique to measure the chemical composition of an environment or the headspace generated by complex samples. However, this approach is still limited by the fact that only a restricted kind of interactions may change the visible spectrum of an indicator. As a consequence, the receptive field, namely the amount of different chemicals that can be captured by an opto-chemical sensor, is rather restricted. To extend the application of optical indicators we propose to use blends of porphyrins and acid-base indicators as materials for opto-chemical sensors. A suitable choice of the components allows to obtain sensing features that are not correlated to those of the single constituents. This strategy provides a straightforward method to develop sensor arrays for a wide number of practical applications, among them it is investigated here the measure of emissions from human skin. © 2012 The Authors. Published by Elsevier Ltd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.