Terahertz Biosensors with high sensitivity for the recognition of neurotransmitter

The quantitative measurement of neurotransmitters with label-free detection methods provides vital clues in tracking neurological functions or disorders. However, there are many challenges for the terahertz biosensor due to the noise and other non-target components like water and so on. Here, we report a rapid quantification method of adrenaline with a specially designed hexagonal open resonant ring. This approach opens opportunities not only for investigating the early diagnostics of neurological disorders or highly sensitive terahertz biosensor applications but also for developing low-cost spectroscopic biosensing applications.