Effect of surface functional groups on the pH sensitivity in ion-sensitive field effect transistors
| Autor: | Nanki Hong, Bo Jin, Chanoh Park, Ki-Soo Jeong, Donghoon Kim, Jun-Sik Yoon, Jeong-Soo Lee |
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| Rok vydání: | 2016 |
| Předmět: |
Differential capacitance
Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Silanol chemistry.chemical_compound Membrane chemistry Functional group Field-effect transistor Amine gas treating Sensitivity (control systems) Electric potential 0210 nano-technology |
| Zdroj: | 2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO). |
| Popis: | For ion-sensitive devices with SiO 2 sensing membrane, the pH sensitivity response has been analyzed when additional functional groups are attached on the SiO 2 membrane. A modified Site-Binding model (SBM) and Gouy-Chapman-Stern (GCS) model are used for the theoretical analysis. In the presence of both silanol and amine groups, the highest pH sensitivity can be achieved at a functional group ratio of 1∶3 or 3∶1. The differential capacitance and intrinsic buffer capacity were also compared in order to understand their effects on pH sensitivity. |
| Databáze: | OpenAIRE |
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