Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition

doi:10.1088/1674-1056/22/10/106801

中国物理B ›› 2013, Vol. 22 ›› Issue (10): 106801-106801.doi: 10.1088/1674-1056/22/10/106801

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition

刘思思, 张朝辉, 张寒冰, 周杰, 何建国, 尹恒洋

School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

收稿日期:2012-11-11 修回日期:2013-05-03 出版日期:2013-08-30 发布日期:2013-08-30
基金资助:
Project supported by the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-09-0211) and the Fundamental Research Funds for the Central Universities (Grant Nos. 2012YJS105 and M13JB00240).

Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition

Liu Si-Si (刘思思), Zhang Chao-Hui (张朝辉), Zhang Han-Bing (张寒冰), Zhou Jie (周杰), He Jian-Guo (何建国), Yin Heng-Yang (尹恒洋)

School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Received:2012-11-11 Revised:2013-05-03 Online:2013-08-30 Published:2013-08-30
Contact: Zhang Chao-Hui E-mail:zhhzhang@bjtu.edu.cn
Supported by:
Project supported by the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-09-0211) and the Fundamental Research Funds for the Central Universities (Grant Nos. 2012YJS105 and M13JB00240).

摘要/Abstract

摘要： Textured silicon (Si) substrates decorated with regular microscale square pillar arrays of nearly the same side length, height, but different intervals are fabricated by inductively coupled plasma, and then silanized by self-assembly octadecyltrichlorosilane (OTS) film. The systematic water contact angle (CA) measurements and micro/nanoscale hierarchical rough structure models are used to analyze the wetting behaviors of original and silanized textured Si substrates each as a function of pillar interval-to-width ratio. On the original textured Si substrate with hydrophilic pillars, the water droplet possesses a larger apparent CAs (>90°) and contact angle hysteresis (CAH), induced by the hierarchical roughness of microscale pillar arrays and nanoscale pit-like roughness. However, the silanized textured substrate shows superhydrophobicity induced by the low free energy OTS overcoat and the hierarchical roughness of microscale pillar arrays, and nanoscale island-like roughness. The largest apparent CA on the superhydrophobic surface is 169.8°. In addition, the wetting transition of a gently deposited water droplet is observed on the original textured substrate with pillar interval-to-width ratio increasing. Furthermore, the wetting state transition is analyzed by thermodynamic approach with the consideration of the CAH effect. The results indicate that the wetting state changed from a Cassie state to a pseudo-Wenzel during the transition.

关键词: superhydrophobicity, wetting state transition, textured silicon substrate, thermodynamic method

Abstract: Textured silicon (Si) substrates decorated with regular microscale square pillar arrays of nearly the same side length, height, but different intervals are fabricated by inductively coupled plasma, and then silanized by self-assembly octadecyltrichlorosilane (OTS) film. The systematic water contact angle (CA) measurements and micro/nanoscale hierarchical rough structure models are used to analyze the wetting behaviors of original and silanized textured Si substrates each as a function of pillar interval-to-width ratio. On the original textured Si substrate with hydrophilic pillars, the water droplet possesses a larger apparent CAs (>90°) and contact angle hysteresis (CAH), induced by the hierarchical roughness of microscale pillar arrays and nanoscale pit-like roughness. However, the silanized textured substrate shows superhydrophobicity induced by the low free energy OTS overcoat and the hierarchical roughness of microscale pillar arrays, and nanoscale island-like roughness. The largest apparent CA on the superhydrophobic surface is 169.8°. In addition, the wetting transition of a gently deposited water droplet is observed on the original textured substrate with pillar interval-to-width ratio increasing. Furthermore, the wetting state transition is analyzed by thermodynamic approach with the consideration of the CAH effect. The results indicate that the wetting state changed from a Cassie state to a pseudo-Wenzel during the transition.

Key words: superhydrophobicity, wetting state transition, textured silicon substrate, thermodynamic method

中图分类号: (Wetting)

68.08.Bc

68.35.Md (Surface thermodynamics, surface energies) 81.16.Rf (Micro- and nanoscale pattern formation) 81.16.Dn (Self-assembly)

刘思思, 张朝辉, 张寒冰, 周杰, 何建国, 尹恒洋. Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition[J]. 中国物理B, 2013, 22(10): 106801-106801.

Liu Si-Si (刘思思), Zhang Chao-Hui (张朝辉), Zhang Han-Bing (张寒冰), Zhou Jie (周杰), He Jian-Guo (何建国), Yin Heng-Yang (尹恒洋). Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition[J]. Chin. Phys. B, 2013, 22(10): 106801-106801.

参考文献 42

[1]	Jung Y C and Bhushan B 2008 J. Microsc. 229 127
[2]	Liu S S, Zhang C H and Liu J M 2010 Acta Phys. Sin. 59 6902 (in Chinese)
[3]	Cai S B and Bhushan B 2008 Mater. Sci. Eng. R 61 78
[4]	Butt H J and Kappl M 2009 Adv. Colloid Interface Sci. 146 48
[5]	Nosonovsky M 2007 Langmuir 23 3157
[6]	Adamson A W 1990 Physical Chemistry of Surfaces (New York: John Wiley & Sons)
[7]	Nosonovsky M and Bhushan B 2007 Ultramicroscopy 107 969
[8]	Koch K and Barthlott W 2009 Phil. Trans. R. Soc. A 367 1487
[9]	Patankar A N 2004 Langmuir 20 8209
[10]	Feng X J and Jiang L 2006 Adv. Mater. 18 3063
[11]	Erbil H Y, Demirel A L, Avci Y and Mert O 2003 Science 299 1377
[12]	Tuteja A, Choi W, Ma M L, Mabry M J, Mazzella A S, Rutledge C G, Mckinley H G and Cohen E R 2007 Science 318 1618
[13]	Lee S M and Kwon T H 2006 Nanotechnology 17 3189
[14]	Bhushan B, Nosonovsky M and Jung Y C 2007 J. R. Soc. Interface 4 643
[15]	Yang Z, Xu X L, Gong M G, Liu L and Liu Y S 2010 Chin. Phys. B 19 126103
[16]	Genzer J and Efimenko K 2000 Science 290 2130
[17]	Sun M H, Luo C X, Xu L P, Ji H, Ouyang Q, Yu D P and Chen Y 2005 Langmuir 21 8978
[18]	Zhai L, Cebeci F C, Cohen R E and Rubner M F 2004 Nano Lett. 4 1349
[19]	Lim J A, Cho J H, Jang Y, Han J T and Cho K 2006 Thin Solid Films 515 2079
[20]	Im M, Im H, Lee J H, Yoon J B and Choi Y K 2010 Langmuir 26 17389
[21]	Nishino T, Meguro M, Nakamae K, Matsushita M and Ueda Y 1999 Langmuir 15 4321
[22]	Salvadori M C, Cattani M, Oliveira M R S, Teixeira F S and Brown I G 2010 J. Appl. Phys. 108 024908
[23]	Zhu M F, Zuo W W, Yu H, Yang W and Chen Y M 2006 J. Mater. Sci. 41 3793
[24]	Furstner R and Barthlott W 2005 Langmuir 21 956
[25]	Gong M G, Xu X L, Yang Z, Liu Y S and Liu L 2010 Chin. Phys. B 19 056701
[26]	Guo Z, Chen X, Li J, Liu J H and Huang X J 2011 Langmuir 27 6193
[27]	Liu H H, Zhang H Y and Li W 2011 Langmuir 27 6260
[28]	Zhao X W, Jiang P, Gao Y, Wang J X, Song L, Liu D F, Liu L F, Dou X Y, Luo S D, Zhang Z X, Xiang Y J, Zhou W Y and Wang G 2005 Chin. Phys. 14 1471
[29]	Guo Z G and Liu W M 2007 Plant Science 172 1103
[30]	Autumn K 2007 MRS Bull. 32 473
[31]	Cassie A B D and Baxter S 1944 Trans. Faraday. Soc. 40 546
[32]	Wenzel R N 1936 Ind. Eng. Chem. 28 988
[33]	Ran C B, Ding G Q, Liu W C, Deng Y and Hou W T 2008 Langmuir 24 9952
[34]	Extrand C W 2002 Langmuir 18 7991
[35]	Lafuma A and Quere D 2003 Nat. Mater. 2 457
[36]	Bormashenko E, Pogerb R, Whyman G and Erlich M 2007 Langmuir 23 6501
[37]	Nosonovsky M and Bhushan B 2008 Langmuir 24 1525
[38]	Ishino C and Okumura K 2008 Eur. Phys. J. E 25 415
[39]	Whyman G and Bormashenko E 2011 Langmuir 27 8171
[40]	Lin L Y, Kim H J and Kim D E 2008 Appl. Surf. Sci. 254 7370
[41]	Wang J D and Chen D R 2008 Langmuir 24 10174
[42]	Patankar N A 2003 Langmuir 19 1249

Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition

Fabrication of pillar-array superhydrophobic silicon surface and thermodynamic analysis on the wetting state transition

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 42

相关文章 1

Metrics

本文评价

推荐阅读 0