28 Copper Nucleation on Nickel from Pyrophosphate-Based Polyligand Electrolyte
447
Fig. 28.2 Current transients
obtained at potentials from
−0.5 to −1.2 V
Fig. 28.3 Cottrell plots
corresponding data from
related chronoamperograms
of Fig. 28.2
Fig. 28.4 Dependencies of
copper ion diffusion
coefficient on copper
deposition potential: 1, using
Eq. (28.4) for 3DI nucleation
model; 2, using Eq. (28.4) for
2DI+3DI nucleation model;
3, using Eq. (28.1)
Current transients obtained at potentials from −0.6 to −1.1 V are linearized in
j −t −0.5 coordinates (Fig. 28.3). This indicates that nucleation process is limited by
diffusion. The diffusion coefficients of discharging ions for each electrode potential
calculated out of the slope of the dependencies in the Cottrell coordinates are shown
in Fig. 28.4, curve 3).