DEVICE AND METHOD FOR ACCUMULATING MONOMOLECULAR FILM

PURPOSE:To accumulate films by controlling the mass of a substance diffused and the surface pressure by a method wherein a water tank is provided with a bill-like water outlet parts on its side corresponding to the pressure applying direction of a water tank and the bill-like water outlet parts are formed so as to be mutually projected into the interior of the water tank. CONSTITUTION:Barriers 5a and 5b, a base plate 6, a base plate holder 7 and a stopper 10 are taken out of a water tank 1. Water is then introduced into the water tank and the dusts on the water surface are removed by overflowing from a bill-like water outlet part 9. The barriers 5a and 5b and the stopper 10 are put back in place and a film substance 4 is dropped onto the surface of the water enclosed by the barriers 5a and 5b to be diffused. After volatilization of the solvent, the area of the water enclosed by the barriers 5a and 5b is reduced and a surface pressure is applied to the monomolecules in the barriers 5a and 5b to form a solid film 4. With the solid film retained with a suitable surface pressure applied by the barriers 5a and 5b, a clean base plate 6 is moved up and down in a direction transverse to the solid film 4 to accumulate the monomolecular films on the base plate 6. In this way the formation of pinholes in the accumulated monomolecular films can be suppressed.