| 摘要 |
PROBLEM TO BE SOLVED: To obtain a nano scale two-dimensional crystal of ultrafine particle of protein or the like by confining nano scale microparticles in a secondary thin film in which the potential energy for the charged particles in an electrolyte film is set at secondary minimum through the control of ionic strength. SOLUTION: When a macroscopically stable thick film (h) has a charge (q) in an electrolyte film and a charged particle having radius R is present, the potential energy for the microparticle has secondary minimum when appropriate ionic strength is selected. Since the minimum appears uniformly in the planar direction within the thin film, the thin film formed in the liquid film can be regarded as a secondary thin film. A microparticle is confined within the core thin film to constitute a two-dimensional system. When one kind of the charged particle is present, for example, Alder transition takes place in the secondary thin film thus bringing about hexagonal close-packed filling. Consequently, the microparticles integrated in the secondary thin film can be formed directly on a solid substrate without causing any deterioration due to transfer. |
