Article having a predetermined surface shape and method for preparation thereof

An article having a predetermined surface configuration comprising a substrate and an organic-inorganic composite film formed on the surface of the substrate,

• wherein the organic-inorganic composite film contains a metal oxide represented by the following formula (3):
• M3Op (3)
• wherein M3 is Si, Ti, Zr, Ge, Al, Sn or Sb, and p is 2 when M3 is Si, Ti, Zr, Ge or Sn and 3/2 when M3 is Al or Sb, and a metal compound represented by the following formula (4):
• R2M4Oq (4)
• wherein R2 is an aryl group, substituted aryl group or benzyl group, M4 is Si, Ti, Zr, Ge, Al, Sn or Sb, and q is 3/2 when M4 is Si, Ti, Zr, Ge or Sn and 2 when M4 is Al or Sb;
• and
• wherein at least one of M3 in the formula (3) and M4 in the formula (4) is at least one specific metal atom selected from the group consisting of Ti, Zr, Ge, Al, Sn and Sb, and the specific metal atom accounts for at least 10 atom % of the total of M3 and M4.

A preparation composition for forming a film for the production of an article having a predetermined surface configuration, comprising:

• (A) 1 molar part of at least one compound selected from the group consisting of a metal compound represented by the following formula (5), a hydrolyzate thereof and a hydrolysis/polycondensation product thereof:
• M1Xm (5)
• wherein M1 is Si, Ti, Zr, Ge, Al, Sn or Sb, X is an alkoxyl group or halogen atom, and m is 4 when M1 is Si, Ti, Zr, Ge or Sn and 3 when M1 is Al or Sb,
• (B) 1.0 to 19 molar parts of at least one compound selected from the group consisting of a metal compound represented by the following formula (6), a hydrolyzate thereof and a hydrolysis/polycondensation product thereof:
• R1M2Yn (6)
• wherein R1 is an aryl group, substituted aryl group or benzyl group, M2 is Si, Ti, Zr, Al or Ge, Y is an alkoxyl group or halogen atom, and n is 4 when M2 is Si, Ti, Zr, Ge or Sn and 3 when M2 is Al or Sb,
• (C) an alcohol in an amount 0.3 to 3 times the total number of molar parts of the components (A) and (B),
• (D) an acid catalyst in an amount 0.00001 to 0.1 time the total number of molar parts of the components (A) and (B), and
• (E) water in an amount 2 to 20 times the total number of molar parts of the components (A) and (B), wherein
• at least one of M1 and M2 is at least one specific metal atom selected from the group consisting of Ti, Zr, Ge, Al, Sn and Sb, and the specific metal atom accounts for at least 10 atom % of the total of M1 and M2.