| Progress in the photoelectronic bio-materials and applications was introduced.Influence of pH value, temperature and illumination on the photochemical activity of (-subunits of phycoerythrocyanin was investigated in this thesis. In comparison with the (-PEC in various carriers such as agar, gelatin, sodium alginate, polyvinyl alcohol-sodium alginate, the agar was selected as better carrier for immobilized (-PEC and was a kind of good chemical for immobilization used in photoelectronic bio-applications assembly based on phycobiliproteins.The protonation/deprotonation reactions triggered by photoactivation of AphA(N490) from cyanobacterium anabaena PCC7120 were investigated. The results presented in this study demonstrated that during the Pr-Pfr transitions of AphA(N490) protons were released from protein to the liquid when induced with 650nm light, while during the Pfr-Pr transitions of AphA(N490) protons were taken up by protein when induced with 700nm light. In addition, the results demonstrated the light-induced proton release and proton uptake reactions in the AphA(N490) from cyanobacterium anabaena PCC7120.Au-Cys-PC composite film was fabricated by self-assembled monolayers (SAMs) on the Au electrode. The photoelectronic characteristics of Au-Cys-PC monolayers were studied. The experiment was carried out for ten times but failed to obtain repeatedly this type of functional monolayer. The photocurrent was observed only once which presented the characteristics of multicycle bio-photoswitch. If this fabrication of the monolayer is repeated in the future, the specific approach reported here supplied a good method to fabricate biomimetic photoelectronic applications based on phycobiliproteins.
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