Portable measurement system for silicon nanowire field-effect transistor-based biosensors

The aim of this study is the development of a portable measurement system that simplifies the analysis of bio-sensitive silicon nanowire field effect transistors (SiNW - FETs). In order to obtain the pH - dependent transfer characteristics of the Schottky barrier (SB) FETs, Id = f (Vg), a measurement unit and two biochip adapters are proposed. For the parallel measurement of multiple SiNW - FETs, an integrated CMOS analog multiplexer has been designed, allowing to connect of up to 32 transistors individually. In order to determine the influence of the measurement structure on signal integrity, overall size and system cost, an additional discrete analog multiplexer will be compared with the integrated solution.