| abstract |
Provided is a hydrophilic sheet which has high wettability by water, from which an adherent fouling substance or adherent foreign matter can be easily removed by washing with water, and which can be prevented from fogging due to water-drop adhesion. Also provided is a method of imparting high wettability by water to the surface of any appropriate base material. A hydrophilic sheet of the present invention includes, on a surface of a support, an assembly layer of oblique columnar structures each protruding at an elevation angle from the surface of less than 90°, and the surface of the assembly layer has a water contact angle of 10° or less. In addition, a method of imparting ultrahigh hydrophilicity to a surface of a base material the present invention is a method of imparting ultrahigh hydrophilicity to the surface of the base material, the method including forming, on the surface of the base material, an assembly layer of oblique columnar structures each protruding at an elevation angle from the surface of less than 90° by an oblique deposition process. |