Features and Benefits

The z-LAB impedance analysis instrument provides new insights into surface coverage, organisation and transport phenomena across thin molecular films. z-LAB offers high sensitivity and fast acquisition of data by monitoring real-time impedance changes at the sensor–solution interface. The impedance data is then presented in terms of capacitance and resistance.

Measurements are based on the proprietary Resonance Enhanced Surface Impedance (RESI) technology. This makes it possible to follow complex molecular events that cannot be detected using conventional impedance spectroscopy, mass-sensitive acoustic or optical techniques.  Applications include studies of surface interactions with proteins, lipids, surfactants, polymers and nanoparticles.
 
 
 
 

Real-time capacitance and resistance analysis

The capacitance reflects the surface coverage and structural state of thin molecular films. The formation and organisation of a surface film (e.g. protein adsorption) can be monitored by following the change in capacitance and resistance over time.

 

 

 

The resistance reflects charge-transfer processes across the interface. Small changes in resistance, due to for example ion transport via incorporated pores in an adsorbed film, can be detected as they occur in real-time.