Quantitative measurement of hydrophilicity/hydrophobicity of the plasma-polymerized naphthalene film (Super Support Film) and other support films and grids in electron microscopy

Hydrophilicity/hydrophobicity of the surfaces of plasma-polymerized naphthalene film (Super Support Film, Nisshin EM Co. Ltd., Tokyo), carbon and formvar support films, and copper and nickel grids were quantitatively estimated by contact angles measured from diameters and heights of water droplets placed on various specimens. With treatment of glow discharge, the surfaces of plasma-polymerized naphthalene and carbon support films became fully...