Simulation-Based Apparent Surface Free-Energy Analysis for Hydrophobic and Superhydrophobic Surfaces

Abstract:

Micro/nano outcrops generated on hydrophobic surfaces are vital outcomes of the super-hydrophobic mechanism in the fabrication of miniature batteries, super-capacitors, field effect transistors and electrochemical and biological sensors. In systematized posts positioned on superhydrophobic surfaces, it is critical to alter the contact angle, whilst the retreating one depends upon the post size and spacing. In this paper, it is shown that calculation of the apparent surface free energy concerned with the probe liquid surface tension, and both advancing and receding contact angles (a and r respectively), is useful for bringing special attention to shedding more light on the wetting properties of superhydrophobic surfaces. A simulation is performed, in order to present this interesting phenomenon, which is in reasonable agreement with experiment. It is concluded that the computation supports categorizing the wetting phenomena as well as encouraging further progress in the fabrication of MEMS/NEMS structures with high efficiency, degree of precision, accuracy, uniformity, aspect ratio and through-put.

• Periodical: Defect and Diffusion Forum (Volumes 305-306)
• Pages: 95-104
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.305-306.95
• Online since: October 2010
• Authors: M.Rizwan Malik, Zi Rong Tang, Tie Lin Shi, Shi Yuan Liu
• Keywords: Apparent Surface Free Energy, Contact Angle Hysteresis, Hydrophobic Silanized Surfaces, Micro Outcrops, Nano Outcrops, Superhydrophobic Silanized Surfaces

References

[1] Fadeev, Y.A., McCarthy, T.J. Langmuir 1999; 15: 3759.

[2] Öner, D, McCarthy T.J. Langmuir 2000; 16: 7777.

[3] Whyman, G., Bormashenko E., Stein, T. Chem. Phys. Lett., 2008; 450: 355.

[4] Gao L., McCarthy J. Langmuir 2006; 22: 5998.

[5] Li W, Amirfazli. J. Colloid Interface Sci. 2005; 292: 195.

[6] Dorrer Ch., Rühe. Langmuir 2006; 22: 7652.

[7] Long J., Hyder M.N., Huang, R.Y.M., Chen, P. Adv Colloid Interface Sci 2005; 118: 173.

[8] Krasovitski, B., Marmur, A. Langmuir 2005; 21: 3881.

[9] Bormashenko, E, Pogreb R, Whyman G, Erlich M. Langmuir 2007; 23: 6501.

[10] Kusumaatmaja H, Yeomans JM. Langmuir 2007; 23: 6019.

[11] Quéré D, Lafuma A, Bico J. Nanotechnology 2003; 14: 1109.

[12] Gao L, McCarthy TJ. Langmuir 2007; 23: 3762.

[13] Nosonovsky M. Langmuir 2007; 23: 9919.

[14] Panchagnula MV, Vedeantam S. Langmuir 2007; 23: 13242.

[15] McHale G. Langmuir 2007; 23: 8200.

[16] Gao L, McCarthy TJ. Langmuir 2007; 23: 13243.

[17] Gao L, McCarthy TJ. Langmuir 2006; 22: 6234.

[18] Gao L, McCarthy TJ. Langmuir 2006; 22: 2966.

[19] Gao L, McCarthy TJ. Langmuir 2007; 23: 9125.

[20] Van Oss CJ. Colloids Surface A 1993; 78: 1.

[21] Lyklema J. Colloids Surf A 1999; 145: 413.

[22] Chibowski E. Wettability and Adhesion 2002; 2: 265.

[23] Chibowski E. Adv Colloid Interface Sci 2003; 103: 149.

[24] Chibowski E. Adv Colloid Interface Sci 2005; 113: 121.

[25] Chibowski E. Adv Colloid Interface Sci 2007; 133: 51.

[26] Bormashenko E, Bormashenko Y, Whyman G, Pogreb R, Musin, Jager R, Barkay Z. Langmuir 2008; 24: 4020.

DOI: 10.1021/la703875b

[27] Fadev AY, McCarthy TJ. Langmuir 2000; 16: 7268.

[28] Lee YL, Chen CH, Yang YM. Langmuir 1998; 14: 6980.