Abstract
A highly sensitive lead ion sensor is developed using graphene ion-sensitive field-effect transistors (G-ISFETs) in an aqueous environmental setting. The sensing channel employs monolayer graphene, while a PVC membrane, incorporating a lead ionophore, serves as the ion-sensitive membrane. The sensor utilizes an electrochemical deposition technique to preconcentrate Pb ion concentration at the solution-sensor interface to enable detection at ultra-low concentration. Notably, the integrated sensor exhibits an exceptional sensitivity of - 36.7 mV/decade and achieves an ultra-low detection limit of 5.6x10-4 ppt, with a limit of quantitation (LOQ) set at 1.0x10-3 ppt.
Original language | English (US) |
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Title of host publication | IEEE 37th International Conference on Micro Electro Mechanical Systems, MEMS 2024 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 887-890 |
Number of pages | 4 |
ISBN (Electronic) | 9798350357929 |
DOIs | |
State | Published - 2024 |
Event | 37th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2024 - Austin, United States Duration: Jan 21 2024 → Jan 25 2024 |
Publication series
Name | Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) |
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ISSN (Print) | 1084-6999 |
Conference
Conference | 37th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2024 |
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Country/Territory | United States |
City | Austin |
Period | 1/21/24 → 1/25/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- Graphene field-effect transistor
- electrochemical preconcentration
- heavy metal
- lead sensor
- ultra-low detection limit