Comparison of Bio Sensing Techniques for VEGF

A wide range of semiconductor bio sensing techniques have been demonstrated over recent years. However, due to the use of different targets and substrate materials it is often not possible to make a direct comparison. In this work we use a common Zinc Oxide platform along with the same target protein to enable a direct comparison between a range of techniques including electrical, optical and electrooptical approaches. The results indicate that while an aptamer-FET appears to provide the most sensitive, several of the other techniques provide a dual detection capability.