|AVS 56th International Symposium & Exhibition|
|MEMS and NEMS||Thursday Sessions|
|Session:||MEMS and NEMS Poster Session|
|Presenter:||Y.C. Jung, The Ohio State University|
|Authors:||Y.C. Jung, The Ohio State University
B. Bhushan, The Ohio State University
|Correspondent:||Click to Email|
Superhydrophobic surfaces exhibit extreme water-repellent properties. These surfaces with high contact angle and low contact angle hysteresis also exhibit a self-cleaning effect and low drag for fluid flow1-4. For t he development of superhydrophobic surfaces, which is important for various applications such as glass windows and solar panels, a lternative materials and fabrication methods need to be explored to improve durability5. It is necessary to perform durability studies on these surfaces in order to identify fabrication techniques and materials that can best withstand real world applications. Micro-, nano-, and hierarchical structures which would lead to superhydrophobicity and self-cleaning are prepared using different fabrication methods. In order to compare the durability of the various fabricated surfaces, f riction and wear studies are performed at the microscale using a pin-on-disk test, where a stationary pin applies a constant normal load while sliding on the sample surface. Waterfall and waterjet tests are also conducted to determine the loss of superhydrophobicity by changing the flow volume and pressure conditions, respectively. The changes in the surface morphology and structure and the wettability are examined by SEM and AFM imaging and contact angle measurements, respectively .
1Bhushan, B., Nanotribology and Nanomechanics – An Introduction, 2nd ed., Springer-Verlag, Heidelberg, Germany, 2008.
2Bhushan, B., “Biomimetics: Lessons from Nature - An Overview”, Phil. Trans. R. Soc. A 367, 1445-1486.
3Nosonovsky, M. and Bhushan, B., Multiscale Dissipative Mechanisms and Hierarchical Surfaces: Friction, Superhydrophobicity, and Biomimetics, Springer, Heidelberg, Germany, 2008.
4Bhushan, B. and Jung, Y. C., “Wetting, Adhesion, and Friction of Superhydrophobic and Hydrophilic Leaves and Fabricated Micro/Nanopatterned Surfaces”, J .Phys: Condens. Matter. 20, 225010 (2008).5Bhushan, B. Jung, Y. C. and Koch, K., “Micro-, Nano-, and Hierarchical Structures for Superhydrophobicity, Self-Cleaning and Low Adhesion”, Phil. Trans. R. Soc. A 367, 1631-1672 (2009).