A composition for a base of a directed self-assembling film includes a compound including an oxo acid group, and a solvent. The compound is preferably represented by formula (1). A represents an organic group having 10 or more carbon atoms and having a valency of n. B represents an oxo acid group. n is an integer of 1 to 200. In a case where n is 2 or greater, a plurality of Bs are identical or different.
AB).sub.n(1)

A composition for a base of a directed self-assembling film includes a compound including an oxo acid group, and a solvent. The compound is preferably represented by formula (1). A represents an organic group having 10 or more carbon atoms and having a valency of n. B represents an oxo acid group. n is an integer of 1 to 200. In a case where n is 2 or greater, a plurality of Bs are identical or different.

AB).sub.n (1)

A composition for a base of a directed self-assembling film includes a compound including an oxo acid group, and a solvent. The compound is preferably represented by formula (1). A represents an organic group having 10 or more carbon atoms and having a valency of n. B represents an oxo acid group. n is an integer of 1 to 200. In a case where n is 2 or greater, a plurality of Bs are identical or different.
AB).sub.n(1)

The invention relates to a method for functionalising a surface of a solid substrate with at least one acrylic acid polymer layer, said method including the steps of: i) placing the surface in contact with a solution having of at least one acrylic acid homopolymer, a solvent and, optionally, metal salts; ii) removing the solvent from the solution in contact with the surface; and iii) binding the polymer to the surface by thermal treatment.