| 초록 |
Wettability is an important surface property that is crucial in many practical applications. In this study, we synthesized N1',N6'-bis(3-(1-pyrrolyl)propanoyl) hexane dihydrazide (hereafter DPH) that self-assembles through intermolecular forces of hydrogen bond and π-π stacking. This DPH molecule was self-assembled to adjust the surface wettability on a wafer. To induce DPH self-assembly, the seed layer was prepared by dropping and drying of 1,1,1,3,3,3-hexafluroro-2-propanol solution containing DPH on silicon wafer. After the seed layer formation, DPH solution in methylene chloride was evaporated at 40℃ during 24h to grow self-assembled microrods on the seed layer. After modification, the surface had a static contact angle of ~ 115° indicating the hydrophobic surface. Treatment of the hydrophobic surface using iron chloride and ammonium persulfate solution changed the surface to be hydrophilic. The water contact angle reduced to ~ 45° after treatment. These results are applicable to the self-cleaning surface, printing, coating and so on.
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