A. Survila et al., PHOTOELECTROCHEMICAL PHENOMENA AT THE INTERFACE CU CU(II), GLYCINE, ALPHA-ALANINE OR BETA-ALANINE/, Electrochimica acta, 38(18), 1993, pp. 2733-2740
The analysis of photopotentials and photocurrents induced by laser bea
m perturbation of the interface Cu/solution of Cu(II)-glycine, alpha-
or beta-alanine complexes, has shown that phase layers containing Cu2O
display the properties of p-type semiconductors, except for the beta-
alanine system which displays n-type conductivity. In accordance with
results of the analysis of thermodynamic and kinetic stability of Cu2O
layers the highest level of photoresponse is observed in the beta-ala
nine system. Inversion of the photocurrent sign has been registered in
the latter system at a certain cathodic overvoltage, the value of whi
ch depends on both the pH of solution and the laser emission intensity
.