Fig. 3. Energetic levels and the model based on ‘imaginary flat capacitor’, which represents averaged interaction between charges in gp51/TiO2/glass structure: L1 – ‘relative distance’ between ‘plates’ area of imaginary capacitor, D2 – diameter of imaginary capacitor, which is determined by surface area of gp51 and can be used for the calculation of relative surface area of imaginary capacitor; φ1 – potential barrier value for surface of TiO2 interphase with air (air//TiO2/glass); φ2 – potential barrier value for gp51/TiO2 structure at interphase with air (air//gp51/TiO2/glass); Δφgp51 – difference of potential barriers between air//TiO2/glass and (air//gp51/TiO2/glass) caused by immobilization of gp51.
