Abstract
Field-effect transistors (FET) using low-dimensional materials has attracted attention for detection of DNA hybridization. Here, we proposed a photocurrent-modulated FET sensor, where the Iphotocurrent(gate)+Iphotocurrent(DNA) dramatically enhance the response signal, Icurrent, compared to a traditional FET sensor. The proposed sensor successfully detects DNA signals with a limit of detection (LOD) down to attomolar concentrations that is nearly 100x lower than a traditional FET sensor. The sensing mechanism is postulated and discussed. The results suggest that photo-coupled modulation opens new avenues for further development of the FET in biosensing applications.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
