High-performance integrated field-effect transistor-based sensors

• Performance of FET-based biosensors for the detection of biomolecules is presented.
• Silicon nanowire, polyaniline and graphene are the highlighted nanoscaled materials as sensing transducers.
• The importance of surface material interaction with the surrounding environment is discussed.
• Different device structure architectures for ease in fabrication and high sensitivity of sensing are presented.

Field-effect transistors (FETs) have succeeded in modern electronics in an era of computers and hand-held applications. Currently, considerable attention has been paid to direct electrical measurements, which work by monitoring changes in intrinsic electrical properties. Further, FET-based sensing systems drastically reduce cost, are compatible with CMOS technology, and ease down-stream applications. Current technologies for sensing applications rely on time-consuming strategies and processes and can only be performed under recommended conditions. To overcome these obstacles, an overview is presented here in which we specifically focus on high-performance FET-based sensor integration with nano-sized materials, which requires understanding the interaction of surface materials with the surrounding environment. Therefore, we present strategies, material depositions, device structures and other characteristics involved in FET-based devices. Special attention was given to silicon and polyaniline nanowires and graphene, which have attracted much interest due to their remarkable properties in sensing applications.

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