Introduction
We simulate bio sensors that consist of a semiconductor that is connected to a "bio material", e.g. a charged molecule in a liquid (electrolyte).
An electrical or optical signal in the semiconductor is generated to detect DNA, proteins or the pH value.
The semiconductor can be, for instance, a GaN/AlGaN HEMT, a silicon-on-insulator (SOI) transistor or a nanowire.
More information: Bio chips
Features
- self-consistent Schrödinger, Poisson-Boltzmann and current equations for semiconductor/electrolyte systems
- 1D, 2D, 3D
- self-consistent Henderson-Hasselbalch equation for concentration of buffer ions
- site-binding model for interface charges
Tutorials
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Gouy-Chapman solution
Poisson-Boltzmann equation: The Gouy-Chapman solution -
ISFET (Ion-Selective Field Effect Transistor)
Electrolyte Gate AlGaN/GaN Field Effect Transistor as pH Sensor -
ISFET (Ion-Selective Field Effect Transistor)
Si-SiO2 electrolyte sensor -
Protein sensor (Ion-Selective Field Effect Transistor)
Detection of proteins with a SOI (silicon-on-insulator) electrolyte sensor -
PMF (Potentials of Mean Force)
Extended Poisson-Boltzmann equation using potentials of mean force (PMF) - Further tutorials (graphene/electrolyte, diamond/electrolyte, Si nanowire DNA sensor) on request. Please contact stefan.birner@nextnano.com for more information.