PURPOSE: To mold a stable disacetylene monomolecular adsorption built-up film by forming a silane monomolecular adsorption film on any substrate and allowing an aliphatic monomolecular film to be coupled to the monomolecular adsorption film using an oxidation coupling reaction method.

CONSTITUTION: A silane surfactant with an acetylene bond in a molecule is allowed to undergo reaction, using a chemical adsorption method, on an Si substrate 1 with SiO2 formed on the surface to form a monomolecular adsorption film 2. Next, a long-chain aliphatic acid with an acetylene bond in the molecule is allowed to undergo reaction on the monomolecular adsorption film 2 using an oxidation coupling method to form a built-up film 5 as the second layer. Thus, for instance, a diacetylene bond 6 is formed on the surface of the adsorption film 2. Again the silane surfactant is allowed to undergo on the surface of the built-up film 5 to form a built-up film 8 as the third layer with the help of a chemical adsorption method. After this, if an energy ray 11 such as far ultraviolet ray is cast to the whole surface of the built-up film, the diacetylene bonds 6 are polymerized with the adjacent other and subsequently, a highly stable diacetylene monomolecular adsorption built-up film is formed.