 |
[email protected] |
 |
3275638434 |
 |
 |
| Paper Publishing WeChat |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Droplet Contact Angle Measurement on Microstructures of Octocoral Sclerites-ESEM Image Analysis
Barkay Zahava*, Golombick Roy, Yasmin Gabay, and Benayahu Yehuda
Full-Text PDF
XML 2773 Views
DOI:10.17265/1934-7375/2016.01.005
This work explores the methodology for micron-scale water droplet contact angle derivation for the warty surface of octocoral sclerites. The calcite-made sclerites of the Red Sea octocoral Dendronephthya hemprichi have been chosen as a model for this study. Water droplet condensation on the sclerites has been in-situ investigated using Quanta 200 FEG (field emission gun) ESEM (environmental scanning electron microscope) under wet environmental conditions. Two different analysis methods of droplet top and side views have been applied to determine the contact angle based on the secondary electron images. The ESEM image analysis for the sclerites indicates that their surface is hydrophilic. The microscopic contact angle is measured to be 45.3 o± 6.3 o. The macroscopic contact angle has been calculated by using the Wenzel model for the surface texturing of the sclerites.
Droplet, contact angle, octocorals, Dendronephthya hemprichi, ESEM.
[1] Gabay, Y., Fine, M., Barkay, Z., and Benayahu, Y. 2014. “Octocoral Tissue Provides Protection from Declining Oceanic pH.” Plos. One 9 (4): 1-7.
[2] Fabricius, K. E., and Alderslade, P. 2001. “Soft Corals and Sea Fans: a Comprehensive Guide to the Tropical Shallow-Water Genera of the Central West Pacific, the Indian Ocean and the Red Sea.” Townsville, Australia: Australian Institute of Marine Science.
[3] Demers, C., Hamdy, C. R., Corsi, K., Chellat, F., Tabrizian, M., and Yahia, L. 2002. “Natural Coral Exoskeleton as Bone Graft Substitute: A Review.” Bio-Medical Materials and Engineering 12: 15-35.
[4] Tentori, E., and Van. Ofwegen, L. P. 2011. “Patterns of Distribution of Calcite Crystals in Soft Coral Sclerites.” Journal of Morphology 272: 614-28.
[5] Grossowicz, M., and Benayahu, Y. 2011. “Differential Morphological Features of Two Dendronephthya Soft Coral Species Suggest Differences in Feeding Niches.” Marine Biodiversity 42 (1): 65-72.
[6] Aronov, D., Rosenman, G., and Barkay, Z. 2007. “Wettability Study of Modified Silicon Dioxide Surface using Environmental Scanning Electron Microscopy.” Journal of Applied Physics 101: 084901-5.
[7] Stelmashenko, N. A., Craven, J. P., Donald, A. M., Terentjev, E. M., and Thiel, B. L. 2001. “Topographic Contrast of Partially Wetting Water Droplets in Environmental Scanning Electron Microscopy.” Journal of Microscopy 204 (2): 172-83.
[8] Brugnara, M., Volpe, C. D., Siboni, S., and Zeni, D. 2006. “Contact Angle Analysis on Polymethylmethacrylate and Commercial Wax by using an Environmental Scanning Electron Microscope.” Scanning 28 (5): 267-73.
[9] Golombick, R., Gabay, Y., Benayahu, Y., and Barkay, Z. 2013. “Droplet Contact Angle Measurement on Dendronephthya Structures—ESEM Image Analysis.” In Proceedings of the 47th Annual Meeting of the Israel Society of Microscopy.
[10] Orkoula, M. G., Koutsoukos, P. G., Robin, M., Vizika, O., and Cuiec, L. 1999. “Wettability of CaCO3 Surfaces.” Colloids and Surfaces A: Physicochem. Eng. Aspects 157: 333-40.
[11] De Gennes, P. G., Brochard-Wyart, F., and Quere, D. 2003. Capillarity and Wetting Phenomena. Germany: Springer.
[12] Donald, A. M. 2003. “The Use of Environmental Scanning Electron Microscopy for Imaging Wet and Insulating Materials.” Nature Materials 2: 511-6.
[13] Jung, Y. C., and Bhushan, B. 2008. “Wetting Behavior during Evaporation and Condensation of Water Microdroplets on Superhydrophobic Pattered Surfaces.” Journal of Microscopy 229 (1): 127-40.