: Sets the polarity (n or p) by generating specific mobile carriers (electrons or holes).
| Type | Sensing Target | Functionalization | Example Application | |------------------|------------------------|---------------------------------------|-------------------------------| | | pH, ions | Si₃N₄ or Al₂O₃ passivation | Blood pH monitoring | | Enzyme FET | Glucose, urea | Immobilized enzyme (e.g., glucose oxidase) | Wearable diabetes sensor | | DNA FET | DNA strands | Single-stranded DNA probes | Rapid pathogen detection | | Gas FET | NO₂, NH₃, H₂S | Metal oxide or polymer film | Environmental surveillance | | Graphene FET | Single molecules | CVD graphene with linker molecules | Ultra-sensitive biosensing | recon fet
RFETs replace traditional chemical doping with . : Sets the polarity (n or p) by