Browse > Article
http://dx.doi.org/10.3795/KSME-B.2016.40.10.659

Wetting Characteristics of Water Droplet on the Solid Surfaces with Variable Pillar-Type Nanostructures  

Yoo, Min Jung (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kwon, Tae Woo (School of Mechanical Engineering, Pusan Nat'l Univ.)
Ha, Man Yeong (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.40, no.10, 2016 , pp. 659-666 More about this Journal
Abstract
A numerical study, using the molecular dynamics simulation method, was carried out to investigate the wetting characteristics of water droplets on a solid square pillar surface with variable periodic edge length patterns at the nanoscale. In this study, the pillar plane was supposed to be rectangular or square shaped. In addition, the surface area was increased while the shape of the pillar plane was kept fixed. In the case of the square pillar, the edge length increased from $4.24{\AA}$ to $12.72{\AA}$. Also, the rectangular pillar had two types of length edges. In this case, one edge length was fixed at $8.48{\AA}$ and the other edge length was increased from $4.24{\AA}$ to $12.72{\AA}$. Through these length changes, the hydrophobicity and hydrophilicity of a water droplet on the variable pillar surfaces were analyzed.
Keywords
Molecular Dynamics; Pillar-type Patterned Surface; Water Droplet; Contact Angle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Su, Y., Ji, B., Huang Y. and Hwang, K.-C., 2010, "Nature's Design of Hierarchical Superhydrophobic Surfaces of a Water Strider for Low Adhension and Low-Energy Dissipation," Langmuir, Vol. 26, No. 24, pp. 18926-18937.   DOI
2 Kong, Y. S. and Kim, T. W., 2013, "Wettability of Biomimetic Riblet Surface Like Sharkskin," Journal of the KSTLE, Vol. 29, pp. 304-309.
3 Wenzel R. N., 1936, "Resistance of Solid Surfaces to Wetting by Water," Ind. Eng. Chem, Vol. 28, pp. 988-994.   DOI
4 Cassie, A. B. D. and Baxter, S., 1944, "Wettability of Porous Surfaces," Trans. Faraday Soc., Vol. 40, pp. 546-551.   DOI
5 Jung, Y. C. and Bhushan, B., 2010, "Biomimetic Structures for Fluid Drag Reduction in Laminar and Tublent Flows," J. Phys. Condens. Matter., Vol. 22, p. 035104.   DOI
6 Jeong, W.-J., Ha, M.-Y., Yoon, H.-S. and Ambrosia, M., 2012, "Dynamic Behavior of Water Droplet on Solid Surfaces with Pillar-Type Nanostructures," Langmuir, Vol. 28, No. 12, pp. 5360-5371.   DOI
7 Sun, K. W., Kwon, T. W. and Ha, M. Y., 2015, "A Numerical Study on Wetting Characteristics of Water Droplet on the Nanosized Wavy-patterned Surface and Stripe-patterned Surface," KSME, pp. 4160-4165.
8 Phillips, J. C., Braun, R., Wang, W., Gumbart, J., Tajkhorshid, E., Villa, E., Chipot, C., Skeel, R. D., Kale, L. and Schulten, K., 2005, "Scalable Molecular Dynamics with NAMD," J.Comput.Chem., Vol. 26, No. 16, pp. 1781-1802.   DOI
9 Kwon, T. W., Ambrosia, M. S., Jang, J. and Ha, M. Y., 2015, "Dynamic Hydrophobicity of Heterogeneous Pillared Surfaces at the Nano-scale," Journal of Mechanical Science and Technology, Vol. 29. No. 4, pp. 1-9.
10 Choi, H., Hong, S.-D., Yoon, H.-S. and Ha, M.-Y., 2009, "Molecular Dynamics Simulation of Water Droplet on the Periodic Stripe Patterned Surfaces," KSME, pp. 302-305.
11 Hirvi, Janne T. and Pakkanen, Tapani A., 2006, "Molecular Dynamics Simulations of Water Droplets on Polymer Surfaces," The Journal of Chemical Physics, Vol. 125, p. 144712.   DOI
12 Lundgren, M., Allan, Neil L. and Cosgrove, T., 2003, "Molecular Dynamics Study of Wetting of a Pillar Surface," Langmuir 2003, Vol. 19, pp. 7127-7129.   DOI
13 Marmur, A., 2003, "Wetting on Hydrophobic Rough Surfaces: To Be Heterogeneous or Not To Be?," Langmuir 2003, Vol. 19, pp. 8343-8348.   DOI
14 Yong X. and Zhang, Lucy T., 2009, "Nanoscale Wetting on Groove-Patterned Surfaces," Langmuir 2009, Vol. 25, No. 9, 5045-5053.   DOI
15 Ambrosia, M. S., Ha, M. Y. and Balachandar, S., 2013, "The Effect of Pillar Surface Fraction and Pillar Height on Contact Angles Using Molecular Dynamics," Applied Surface Science, Vol. 282, pp. 211-216.   DOI
16 Ko, J.-A., Choi, H.-J., Ha, M.-Y., Hong, S.-D. and Yoon, H.-S., 2010, "A Study on the Behavior of Water Droplet Confined between an Atomic Force Microscope Tip and Rough Surfaces," Langmuir 2010, Vol. 26, No. 12, 9728-9735.   DOI