Thin film polymer structure having different modification on opposite sides thereof

#The present invention relates to a thin film polymer structure having identical or different functional substances on its face (A surface) and reverse face (B surface) and a method for preparing the same.

#As methods for creating organic molecular thin films, a spin-coating method, an electrolytic polymerization method, a vapor deposition method, a vapor deposition polymerization method and the like are conventionally used. As a method for forming an alignment layer, the Langmuir-Blodgett (LB) method is well known. This method is performed as follows. Amphiphilic molecules are dissolved in a volatile organic solvent to be developed on a gas-liquid interface. After the solvent is vaporized, the resultant substance is compressed. The resultant monomolecular layer is transferred to a solid substrate. With this method, the number of the thin film layers and the order of lamination can be controlled. However, this method is only applicable to molecules which can be developed on a water surface as a monomolecular layer and thus is only effective for amphiphilic molecules, which are water-insoluble. The LB method is not efficient because the equipment to be used is expensive and cannot be easily handled.

#A technology has been established for forming a self-assembled monolayer (SAM) including organic molecules regularly and stably aligned on a surface of a metal material such as gold or platinum, or a surface of an inorganic material such as silicon, silica or glass. Features of this technology are that the monolayer is strongly bonded to the substrate and so is stable, and the monolayer can be formed at low cost and in a simple manner without using any special equipment by merely immersing the substrate in a solution. In addition, this technology is applicable to a substrate having a complicated shape. This technology is attracting attention as, for example, a nanotechnology for constructing a pattern of organic molecules on an ultrafine pattern formed by a lithography technology(4).

#FIG. 1 shows an outline of ODMS-SiO2 substrate production and the HSA adsorption and exfoliation processes.

#FIG. 2 shows an HSA nanosheet atop the PVA film as seen through the following: (a) light microscope and (b) fluorescent microscope.

#FIG. 3 shows an outline of the process wherein NBD-labeled latex beads bond to the surface of the HSA nanosheet.

#Hereinafter, embodiments of the present invention will be described. The following embodiments are given in order to illustrate the present invention and are not intended to limit the present invention in any way. The present invention can be carried out in various embodiments as long as said embodiments do not depart from the scope thereof.

#The documents, laid-open publications, patent gazettes and other patent documents cited in this specification are incorporated herein by reference. The present specification incorporates the contents of the specification of Japanese Patent Application No. 2006-292688, which serves as the basis for claiming the priority of the present application.

#Hereinafter, a method for preparing a thin film polymer structure according to the present invention (hereinafter, referred to also as a “sheet”) having a different functional substance on its each of its two sides will be described.