Semiconductor Device-Based Sensors for Gas, Chemical, and Biomedical Applications

36 Semiconductor Device-Based Sensors for Gas, Chemical, and Biomedical Applications

© 2011 by Taylor & Francis Group, LLC

obtained experimentally. This agreement supports the assumption that the sensor signal is indeed

generated by the potential changes caused by the positive ion uxes, and is not a pure pH response.

1.7.2  estimation of the ion flux in cleft

To understand the generated sensor signal, especially the ions’ contribution to the recorded signal, a

calculation of the ions’ concentration in the cleft is performed. The total ion ux is calculated from

the available data. The distance d

cleft

of the cell to the sensor surface is assume ...