Table 1 Parameters used in comparative analysis.
From: Theoretical analysis of MWCNT and MXene/High-k pH BioFET sensors for biomedical applications
Parameter name | Symbols | Si/SiO2 | MXene/High-k | MWCNT/SiO2 |
|---|---|---|---|---|
Threshold voltage reference | Vt0ref | 0.5 V | − 0.2 V | 0.1 V |
Electron mobility | µref | 600 cm2/Vs | 2000 cm2/Vs | 500 cm2/Vs |
Subthreshold slope | SS | 80 mV/decade | 100 mV/decade | 90 mV/decade |
Channel length modulation parameter | λ | 0.01 1/V | 0.05 1/V | 0.15 1/V |
Oxide thickness | tox | 5 nm | 5 nm | 10 nm |
Channel length | L | 180 nm | 180 nm | 180 nm |
Aspect ratio | W/L | 10 | 10 | 10 |
Work function difference | Φms (V) | − 0.049 eV | − 0.1 | + 0.19 |
Fermi potential | 2Φf (V) | 0.60 V | – | – |
Depletion charge | QB (C/cm2) | 2 × 10− 8 | – | – |
Oxide charge | QOX(C/cm2) | 1.0 × 10− 8 | – | – |
Interface charge | Qss (C/cm2) | 5 × 10⁻9 | 3.08 × 10− 7 | 3.11 × 10−8 |
Oxide capacitance | Cox (F/cm2) | 6.9 × 10−7 | 1.59 × 10− 6 | 3.45 × 10−7 |
