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2-propanol (HFIP), aniline, and 2,3,4,5,6-pentafluoroaniline were purchased from Sigma-Aldrich Co. (St. Louis, MO). Fabrication of superhydrophobic peptide film: Amorphous thin peptide film was prepared by drying a drop of diphenylalanine solution in HFIP under an anhydrous condition in a glove box (model: MOGB 1S, Moisture Oxygen Technology Co., Korea), and then treated with pentafluoroaniline vapor (or aniline vapor for the control experiment) at 100 ºC for 12 h. A self-cleaningdoi:10.1039/b906783c fatcat:tfatpgvcqzhtjkf7gqgukk6qmy