Copper-indium-sulfide colloids on quantum dot sensitized TiO solar cell: Effects of capping with mercapto-acid linker molecules.

The copper-indium-sulfide (CIS) ternary colloids were synthesized in "green" water solvent at room temperature employing mercapto-alkyl carboxylic linker molecules such as thioglycolic acid (TGA), thioacetic acid (TAA), 2-mercaptopropionic acid (2-MPA) and l-cysteine (Cys). The stability of the CIS colloids is strongly influenced by the structures of linker molecules, and short linker molecules induce strong adsorption of the CIS colloids on the TiO, exhibiting strong visible-light absorption and high photo-conductivities. Effects of linker molecules capping CIS colloids on the solar cell performances were demonstrated.

Studies on conjugation of Spirogyra using monoclonal culture.

We succeeded in inducing conjugation of Spirogyra castanacea by incubating algal filaments on agar plate. Conjugation could be induced using clone culture. The scalariform conjugation was generally observed, while lateral conjugation was rarely.