Thick film sensor arrays

Moreover, a thick-film sensor array suitable for automation combined to readout based on intermittent pulse amperometry (IPA) has been commercialised by Alderon Biosciences [27,28]. These genosensors and the readout instruments provide a simple, accurate and inexpensive platform for patient diagnosis. 

A PtOEP-doped polystyrol layer was spread on a transparent polyester support with a thickness of 125 xm. After evaporation of the solvent, 3-5 pm thick sensor films were obtained. Circular spots were punched out of the sensor foil and fixed at the bottom of microtiter plate wells. These ready-for-use sensor arrays can be applied for a parallel determination of p(>2 in aqueous solution in multiplexed samples. The read-out of the sensor arrays was performed by means of ratiometric imaging via the RLI method shown in Fig. 4. 

An early example of an integrated gas sensor array is a thick-film implementation developed by Hitachi [49], with six discrete metal oxide sensor areas on an alumina substrate (figure 14.5). The chip is heated to 4(K) °C with a platinum heater printed on the bottom of the substrate. More recently, other Sn02-based arrays have been reported. A low-power, 1.5 mm foursensor array employing Sn02 has been demonstrated for detection of toxic... 

Work performed at Oak Ridge National Laboratory (ORNL) has paralleled much of the work described previously in this chapter. Experiments have involved the construction and testing of metal oxide sensor arrays, accompanied in some cases by the application of pattern recognition techniques. More recently, new sensor work has concentrated on the development of solid state, resistive hydrogen sensors, both thin- and thick-film versions. 

Llobet, E., Brezmes, J., Vilanova, X., Sueiras, J.E., Correig, X. Qualitative and quantitative analysis of volatile organic compounds using transient and steady-state responses of a thick-film tin oxide gas sensor array. Sensors and Actuators B - Chemical 41, 13-21 (1997)... 

To summarize, the results show that the use of the compact OLED-based sensor array is a viable approach for simultaneous monitoring of these multiple anal5des. As described later, work is in progress to develop more compact sensors, where additionally pm-thick thin-film PD arrays, such as those based on amorphous or nanocrystalline Si (nc-Si), are structurally integrated with the OLED/sensing component module. ... 

Srivastava, J. K., Pandey, E, Jha, S. K., Mishra, V. N. and Dwivedi, R. (2011) Chemical Vapor Identification by Plasma Treated Thick Film Tin Oxide Gas Sensor Array and Pattern Recognition, Sens. Transd., 125,42. 

ZnO devices can also be classified into three types thick-film, thin-film, and microsensor (array). In addition, the additives to the films serve to make the sensors sensitive, selective, stable, etc. 

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