Wettability and formation mechanism of ZnO micro-spheres composed film

doi:10.1088/1674-1056/19/12/126103

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 126103-126103.doi: 10.1088/1674-1056/19/12/126103

Wettability and formation mechanism of ZnO micro-spheres composed film

杨周, 许小亮, 公茂刚, 刘玲, 刘艳松

Department of Physics, University of Science and Technology of China, Hefei 230026, China

收稿日期:2010-05-13 修回日期:2010-06-16 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50872129) and Natural Science Foundation of Anhui Province of China (Grant No. 070414187).

Wettability and formation mechanism of ZnO micro-spheres composed film

Yang Zhou(杨周), Xu Xiao-Liang(许小亮)^†, Gong Mao-Gang(公茂刚), Liu Ling(刘玲), and Liu Yan-Song(刘艳松)

Department of Physics, University of Science and Technology of China, Hefei 230026, China

Received:2010-05-13 Revised:2010-06-16 Online:2010-12-15 Published:2010-12-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50872129) and Natural Science Foundation of Anhui Province of China (Grant No. 070414187).

摘要/Abstract

摘要： This paper reports that the film composed of flower-like ZnO micro-spheres, which consists of nano-sheets, is fabricated by chemical bath deposition. By adding hydrogen fluoride (HF) into the reaction solution, which contains zinc nitrate hexahydrate and hexamethylenetetramine, the ZnO crystal growth process is changed and the film composed by ZnO micro-spheres is obtained after keeping the reaction solution at 95 oC for 2 h. The morphology, crystal phase and wettability of the sample are characterized by scanning electron microscope, x-ray diffraction and contact angle meter, respectively. The results show that the film has the micro-nano compound structure. After modification with heptadecafluorodecyltrimethoxy-silane, the wettability of the film changed from superhydrophilicity to superhydrophobicity, on which water contact angle and the sliding angle are 154o and less than 5o for 8-μL water droplet, respectively. Additionally, the formation mechanism of the ZnO micro-sphere is also discussed.

Abstract: This paper reports that the film composed of flower-like ZnO micro-spheres, which consists of nano-sheets, is fabricated by chemical bath deposition. By adding hydrogen fluoride (HF) into the reaction solution, which contains zinc nitrate hexahydrate and hexamethylenetetramine, the ZnO crystal growth process is changed and the film composed by ZnO micro-spheres is obtained after keeping the reaction solution at 95 $^\circ$C for 2 h. The morphology, crystal phase and wettability of the sample are characterized by scanning electron microscope, x-ray diffraction and contact angle meter, respectively. The results show that the film has the micro-nano compound structure. After modification with heptadecafluorodecyltrimethoxy-silane, the wettability of the film changed from superhydrophilicity to superhydrophobicity, on which water contact angle and the sliding angle are 154$^\circ$ and less than 5$^\circ$ for 8-μL water droplet, respectively. Additionally, the formation mechanism of the ZnO micro-sphere is also discussed.

Key words: ZnO, micro-sphere, hydrogen fluoride, superhydrophobic, formation mechanism

中图分类号: (Wetting)

68.08.Bc

68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 68.55.A- (Nucleation and growth) 81.15.Lm (Liquid phase epitaxy; deposition from liquid phases (melts, solutions, And surface layers on liquids))

杨周, 许小亮, 公茂刚, 刘玲, 刘艳松. Wettability and formation mechanism of ZnO micro-spheres composed film[J]. 中国物理B, 2010, 19(12): 126103-126103.

Yang Zhou(杨周), Xu Xiao-Liang(许小亮), Gong Mao-Gang(公茂刚), Liu Ling(刘玲), and Liu Yan-Song(刘艳松). Wettability and formation mechanism of ZnO micro-spheres composed film[J]. Chin. Phys. B, 2010, 19(12): 126103-126103.

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Wettability and formation mechanism of ZnO micro-spheres composed film

Wettability and formation mechanism of ZnO micro-spheres composed film

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