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�������պ����ѧѧ�� 2008, Vol. 34 Issue (12) :1419-1422    DOI:
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Preparation of superhydrophobic copper surfaces by electroplating
Qiao Zhenmei, Xi Wenjun, Zhu Chunlei, Jia Ao*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The structure of the natural superhydrohlbic surface, lotus leaf, was studied, which inspired the fabrication method of superhydrophobic surfaces. Various copper surfaces were fabricated in different current densities via electroplating. As the current density increased, the water contact angle (CA) increased first and then decreased. When the current density was about 0.08 A/cm2, the electroplated copper surface which resembled the lotus leaf reached superhydrophobic state (CA=153.5°, SA (sliding angle) = 7.9°). The surface with lotus leaf structure is superhydrophobic without any surface modification. It-s suggested that this is a meta-stable state in Cassie state. As long as the surface structure is suitable, a hydrophobic surface could be gotten, or even superhydrophobic surface, on hydrophilic materials. The hydrophobic mechanism was also analyzed. The results widen the horizon of fabricating superhydrophobic surfaces on hydrophilic materials and give light to the existing popular theories.
Keywords�� superhydrophobic   electroplating   lotus leaves structure     
Received 2007-10-16;
About author: ������(1981-),Ů,ɽ��̩����,˶ʿ��,xiwj@buaa.edu.cn.
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������, ϯ�ľ�, �촺��, �� ��.��Ʒ��Ʊ�����ˮ��ͭ����[J]  �������պ����ѧѧ��, 2008,V34(12): 1419-1422
Qiao Zhenmei, Xi Wenjun, Zhu Chunlei, Jia Ao.Preparation of superhydrophobic copper surfaces by electroplating[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(12): 1419-1422
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