Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance
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The Ohio State University / OhioLINK
2016
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu14755164430088292021-08-03T06:38:43Z Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance Ebert, Daniel Ray Mechanical Engineering Nanotechnology superhydrophobic lotus effect biomimetic nanotechnology Superhydrophobic surfaces (defined as surfaces having water contact angle greater than 150°) show great promise for use in a rapidly growing number of engineering applications, ranging from biomedical devices to fluid drag reduction in pipelines. In nature, the surfaces of many organisms, such as certain plant leaves, are known to exhibit superhydrophobicity. In some cases, droplet adhesion is very low (droplet rolls away easily), while in other cases adhesion is high (droplet remains adhered when surface is inverted). The recent advent and development of microscopes with resolution down to a few nanometers (such as atomic force microscopes and scanning electron microscopes) has allowed for in-depth understanding of the micro- and nanoscale mechanisms employed by these plant leaves and other natural surfaces to achieve their particular wetting properties. Biomimetics (or “mimicking nature”) is therefore a very promising approach for the development of engineering surfaces with desired wetting characteristics. However, research in creating biomimetic surfaces is still in its early stages, and many of the surfaces created thus far are not mechanically robust, which is required for many potential real-world applications. In addition, for applications such as self-cleaning windows and solar panels, optical transparency is required.In this thesis, a set of original studies are presented in which superhydrophobic surfaces were designed based on biomimetics and fabricated using a wide of variety of techniques. The surfaces were characterized with regard to wetting characteristics such as water contact angle and contact angle hysteresis, micro- and nanoscale mechanical durability, and in some cases optical transmittance. Theoretical wetting models served as guides both in the design and in the understanding of experimental results, especially in regard to different wetting regime and regime transition. This work provides important conclusions and valuable insight for identifying materials, techniques, and designs for mechanically durable, optically transparent superhydrophobic surfaces. 2016 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1475516443008829 http://rave.ohiolink.edu/etdc/view?acc_num=osu1475516443008829 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
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NDLTD |
| topic |
Mechanical Engineering Nanotechnology superhydrophobic lotus effect biomimetic nanotechnology |
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Mechanical Engineering Nanotechnology superhydrophobic lotus effect biomimetic nanotechnology Ebert, Daniel Ray Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| author |
Ebert, Daniel Ray |
| author_facet |
Ebert, Daniel Ray |
| author_sort |
Ebert, Daniel Ray |
| title |
Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| title_short |
Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| title_full |
Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| title_fullStr |
Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| title_full_unstemmed |
Superhydrophobic, Biomimetic Surfaces with High and Low Adhesion, Optical Transmittance, and Nanoscale Mechanical Wear Resistance |
| title_sort |
superhydrophobic, biomimetic surfaces with high and low adhesion, optical transmittance, and nanoscale mechanical wear resistance |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2016 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1475516443008829 |
| work_keys_str_mv |
AT ebertdanielray superhydrophobicbiomimeticsurfaceswithhighandlowadhesionopticaltransmittanceandnanoscalemechanicalwearresistance |
| _version_ |
1719440833033273344 |