
16 Semiconductor Device-Based Sensors for Gas, Chemical, and Biomedical Applications
© 2011 by Taylor & Francis Group, LLC
In addition to noise, a signal drift appears during the measurements, which is a common prob-
lem for all chemical sensors, and which complicates quantitative measurements. However, for the
study of cell reaction to different inhibitors, the signal changes are expected to be small and the
long preparation periods necessary for the proliferation of cells ensures a stabilization of the sensor
signal as far as is possible. Moreover, most of the drift can be neglected due to the fast response of
cells. Consequently, even if qua ...