TECHNOLOGY FOCUS - ELECTRONICS - Preferred Method: The method further comprises: polarizing the irradiated light with the at least one mirror before the photocatalytic capped colloidal nanocrystals absorb the irradiated light, where the reflective surface is at least one mirror; steering the mirror so that the mirror maintains Brewster's angle relative to the sun; focusing the polarized light with a focusing mirror; steering a second mirror so that the polarized light is directed at the oriented photocatalytic capped colloidal nanocrystals at an angle that facilitates optimal absorption; recycling the unreacted water by passing unreacted water in the reservoir back into the reaction vessel; heating the water entering the reaction vessel so that the water boils and is in a gaseous state when reacting with the photocatalytic capped colloidal nanocrystals in the reaction vessel; and filtering the unreacted water, hydrogen gas, and oxygen gas leaving the reaction vessel. The mirror is steered using a sun tracking system. The step of forming photocatalytic capped colloidal nanocrystals comprises: growing semiconductor nanocrystals by employing a template-driven seeded growth; and capping the semiconductor nanocrystals with an inorganic capping agent in a polar solvent to form photocatalytic capped colloidal nanocrystals. The step of growing semiconductor nanocrystals by employing the template-driven seeded growth method comprises: depositing a seed crystal on a substrate; and growing the semiconductor nanocrystal from the seed crystal using molecular beam epitaxy or chemical beam epitaxy so that the semiconductor nanocrystal grows according to the seed crystals structure. The step of capping the semiconductor nanocrystals with an inorganic capping agent in the polar solvent to form the photocatalytic capped colloidal nanocrystals comprises: reacting semiconductor nanocrystals precursors in the presence of an organic capping agent to form organic capped semiconductor nanocrystals; reacting the organic capped semiconductor nanocrystals with an inorganic capping agent; adding immiscible solvents causing the dissolution of the organic capping agents and the inorganic capping agents so that organic caps on the semiconductor nanocrystals are replaced by inorganic caps to form inorganic capped semiconductor nanocrystals; and performing an isolation procedure to purify the inorganic capped semiconductor nanocrystals and remove the organic capping agent. The step of orienting the photo-catalytic capped colloidal nanocrystals is performed by: applying an electric field, where the direction of the electric field is substantially parallel with a desired electric dipole moment of the photocatalytic capped colloidal nanocrystals; combing deposition technique; or employing a Langmuir Blodgett method to form a Langmuir Blodgett film.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The nanocrystals include charged ligands that assist in controlling the orientation of the photocatalytic capped colloidal nanocrystals. The photocatalytic capped colloidal nanocrystals comprises one of e.g. zinc sulfide titanium dioxide, titanium dioxide copper(II) oxide, zinc sulfide ruthenium oxide, zinc sulfide rhenium oxide, gold arsenic sulfide, gold thiostannate (Au.Sn2S6), gold thiostannate (Au.SnS4), gold selenidostannates, gold selenoindates (Au.In2Se4), bismuth sulfide pentateleruro de diantimonio, bismuth sulfide hepta teleruro de diantimonio, bismuth selenide hepta teleruro de diantimonio, cadmium selenide thio stannate (CdSe.Sn2S6), cadmium selenide hexa teleruro de diantimonio (CdSe.Sn2Te6), cadmium selenide selenoindates (CdSe.In2Se4), cadmium selenide digermanate (CdSe.Ge2S5) or (CdSe.Ge2Se3), cadmium selenide mercury selenide (CdSe.HgSe2) and cadmium selenide zinc telluride (CdSe.ZnTe). The shape of the photo-catalytic capped colloidal nanocrystals is chosen based on a desired wavelength of the irradiated light usable by the semiconductor nanocrystals. Each photocatalytic capped colloidal nanocrystal includes a second semiconductor nanocrystal capped with a second inorganic capping agent, where the first inorganic capping agent acts as a reduction photocatalyst, and the second inorganic capping agent acts as an oxidation photocatalyst. EXAMPLE - No suitable example given.