Anomalous wetting on a superhydrophobic graphite surface

作者：Hong Siang Jie^*; Li Yueh Feng; Hsiao Mu Jou; Sheng Yu Jane; Tsao Heng Kwong

来源：Applied Physics Letters, 2012, 100(12): 121601.

DOI：10.1063/1.3697831

• adhesion
• contact angle
• graphite
• hydrophobicity
• ultrasonic applications
• wetting

A superhydrophobic graphite surface has been fabricated through two facile physical steps, peeling and ultrasonicating. Peeling yields micron-scale roughening, and thus a highly hydrophobic surface is obtained. Further ultrasonicating results in a superhydrophobic surface with nanostructure embedded in microstructure. The nanostructure leads to networklike pores on the superhydrophobic film and convective Ostwald ripening is observed. Owing to their distinct resistance to liquid imbibition, contact angle hysteresis on hydrophobic and superhydrophobic surfaces is fundamentally different. Moreover, the adhesive force on a superhydrophobic surface grows with the contact time, and such aging effect is absent on hydrophobic graphite surface.

• 出版日期2012-3-19
• 单位中央民族大学