A Real-Time Free Chlorine Monitoring by Graphene Field-Effect Transistor
- Resource Type
- Conference
- Authors
- Mopoung, Kunpot; Suwanyangyaun, Pattana; Odanaka, Reiji; Kosuga, Shohei; Watanabe, Takeshi; Koh, Shinji; Sanorpim, Sakuntam
- Source
- 2019 IEEE 14th International Conference on Nano/Micro Engineered and Molecular Systems (NEMS) Nano/Micro Engineered and Molecular Systems (NEMS), 2019 IEEE 14th International Conference on. :64-67 Apr, 2019
- Subject
- Bioengineering
Engineered Materials, Dielectrics and Plasmas
Robotics and Control Systems
Signal Processing and Analysis
Chlorine
Graphene
Electrodes
Monitoring
Two dimensional displays
Current measurement
Real-time systems
Free chlorine
I-V Characteristics
GFET
- Language
- ISSN
- 2474-3755
We have fabricated a real-time graphene field effect transistor (GFET) for monitoring free chlorine concentration. A monolayer graphene was grown by low-pressure chemical vapor deposition (LP-CVD) on Cu foil and then transferred to silicon substrate to be a sensing material of GFET. The source and drain electrodes of GFET were Au/Cr, while gate electrode was Ag/AgCl. Free chlorine concentrations (0 to 29.93 ppm) were diluted from sodium hypochlorite (NaClO) in phosphate buffered saline (PBS) solution. The current-voltage (I-V) characteristic measurements from GFET show results that relative responding of the current in the range from 0 to 3 ppm of free chlorine concentrations. Our GFET shows possibility for multiple use which is suitable for the real-time free chlorine monitoring system especially in drinking water.