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000155448 0247_ $$2doi$$a10.1002/elan.201400076
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000155448 1001_ $$0P:(DE-Juel1)128688$$aHuck, Christina$$b0$$eCorresponding Author
000155448 245__ $$aMultiparameter Sensor Chip with Barium Strontium Titanate as Multipurpose Material
000155448 260__ $$aWeinheim$$bWiley-VCH-Verl.$$c2014
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000155448 520__ $$aIt is well known that biochemical and biotechnological processes are strongly dependent and affected by a variety of physico-chemical parameters such as pH value, temperature, pressure and electrolyte conductivity. Therefore, these quantities have to be monitored or controlled in order to guarantee a stable process operation, optimization and high yield. In this work, a sensor chip for the multiparameter detection of three physico-chemical parameters such as electrolyte conductivity, pH and temperature is realized using barium strontium titanate (BST) as multipurpose material. The chip integrates a capacitively coupled four-electrode electrolyte-conductivity sensor, a capacitive field-effect pH sensor and a thin-film Pt-temperature sensor. Due to the multifunctional properties of BST, it is utilized as final outermost coating layer of the processed sensor chip and serves as passivation and protection layer as well as pH-sensitive transducer material at the same time. The results of testing of the individual sensors of the developed multiparameter sensor chip are presented. In addition, a quasi-simultaneous multiparameter characterization of the sensor chip in buffer solutions with different pH value and electrolyte conductivity is performed. To study the sensor behavior and the suitability of BST as multifunctional material under harsh environmental conditions, the sensor chip was exemplarily tested in a biogas digestate.
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000155448 7001_ $$0P:(DE-Juel1)128717$$aPoghossian, Arshak$$b1
000155448 7001_ $$0P:(DE-HGF)0$$aKerroumi, Iman$$b2
000155448 7001_ $$0P:(DE-Juel1)142466$$aSchusser, Sebastian$$b3
000155448 7001_ $$0P:(DE-Juel1)128668$$aBäcker, Matthias$$b4
000155448 7001_ $$0P:(DE-Juel1)128648$$aZander, Willi$$b5
000155448 7001_ $$0P:(DE-Juel1)128631$$aSchubert, Jürgen$$b6
000155448 7001_ $$0P:(DE-HGF)0$$aBuniatyan, Vahe V.$$b7
000155448 7001_ $$0P:(DE-HGF)0$$aMartirosyan, Norayr W.$$b8
000155448 7001_ $$0P:(DE-HGF)0$$aWagner, Patrick$$b9
000155448 7001_ $$0P:(DE-Juel1)128727$$aSchöning, Michael J.$$b10
000155448 773__ $$0PERI:(DE-600)1483564-2$$a10.1002/elan.201400076$$gVol. 26, no. 5, p. 980 - 987$$n5$$p980 - 987$$tElectroanalysis$$v26$$x1040-0397$$y2014
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