A Real-Time Free Chlorine Monitoring by Graphene Field-Effect Transistor
| Autor: | Reiji Odanaka, Shohei Kosuga, Pattana Suwanyangyaun, Kunpot Mopoung, Shinji Koh, Takeshi Watanabe, Sakuntam Sanorpim |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Silicon Graphene Analytical chemistry chemistry.chemical_element 02 engineering and technology Substrate (electronics) Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Sodium hypochlorite Electrode polycyclic compounds Chlorine 0210 nano-technology FOIL method |
| Zdroj: | NEMS |
| DOI: | 10.1109/nems.2019.8915664 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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