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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 陳炳煇 | |
| dc.contributor.author | Wei-Ting Huang | en |
| dc.contributor.author | 黃煒婷 | zh_TW |
| dc.date.accessioned | 2021-06-14T17:18:03Z | - |
| dc.date.available | 2013-07-30 | |
| dc.date.copyright | 2008-07-30 | |
| dc.date.issued | 2008 | |
| dc.date.submitted | 2008-07-27 | |
| dc.identifier.citation | [1] W. Barthlott and C. Neinhuis, 'Purity of the sacred lotus, or escape from contamination in biological surfaces,' Planta, vol. 202, pp. 1-8, 1997.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/41116 | - |
| dc.description.abstract | This work studies the influences of surface structure on hydrophobicity, and the transmittance of each structure was also taken into account. We investigated three kinds of structures in this work, namely surfaces with nanometer scale, micrometer scale, and hierarchical structures (composed of micro- and nanostructure). The nanostructures and the hierarchical structures on glass surfaces were developed by assembled polystyrene nanospheres; the microstructures on PDMS substrates with different feature sizes were fabricated by soft lithography method. To create a surface with micrometer scale, circular pillars were chosen as the patterns by changing interpillar distance and the height of micropillars. Our results show that as the surface roughness enhanced, the formation of air package between liquid and solid interface contributes to better hydrophobicity. After the surface roughness is enhanced, the surface hydrophobicity increased, whereas the transmittance decreased. A superhydrophobic and nearly transparent surface is obtained on microstructured PDMS surface with water contact angle 153° and transmittance about 90%. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-14T17:18:03Z (GMT). No. of bitstreams: 1 ntu-97-R95522108-1.pdf: 7091190 bytes, checksum: 5726a783ed92d8aeeafb25afa000405e (MD5) Previous issue date: 2008 | en |
| dc.description.tableofcontents | Acknowledgement.....................................................................................I
Abstract...................................................................................................III Nomenclature...........................................................................................V Table of Content.....................................................................................VI List of Tables........................................................................................VIII List of Figures.........................................................................................IX Chaper 1 Introduction 1 1.1 Motivation 1 1.2 Literature review 2 1.2.1 Lotus-effect 2 1.2.2 Biomimetic technology for superhydrophobic surfaces 4 1.2.3 Preparation of superhydrophobic surfaces 6 1.3 Aims and missions 11 Chaper 2 Theory 21 2.1 Surface energy 21 2.2 Static contact angle 22 2.2.1 Young’s equation 23 2.2.2 Wenzel’s equation 24 2.2.3 Cassie-Baxter regime 25 2.3 Contact angle hysteresis 26 2.4 Wetting transition of water droplets 28 Chaper 1 Introduction 1 1.1 Motivation 1 1.2 Literature review 2 1.2.1 Lotus-effect 2 1.2.2 Biomimetic technology for superhydrophobic surfaces 4 1.2.3 Preparation of superhydrophobic surfaces 6 1.3 Aims and missions 11 Chaper 2 Theory 21 2.1 Surface energy 21 2.2 Static contact angle 22 2.2.1 Young’s equation 23 2.2.2 Wenzel’s equation 24 2.2.3 Cassie-Baxter regime 25 2.3 Contact angle hysteresis 26 2.4 Wetting transition of water droplets 28 Chaper 3 Experiments and principles of testing equipments 37 3.1 Materials and reagents 37 3.2 Preparation of Self-assembled polystyrene crystal films 37 3.3 Fabrication of microstructured PDMS templates 38 3.3.1 Fabrication of positive mold by MEMS process 39 3.3.2 Fabrication of the PDMS microstructured molds and films 41 3.4 Preparation of PS hierarchical structure 42 3.5 Soft-lithographic Imprinting 43 3.6 Measuring Principles of Testing Instruments 44 3.6.1 Electron microscopy (EM) 46 3.6.2 Contact angle system 49 3.6.3 Ultraviolet/visible spectrophotometer (UV/Vis) 50 Chaper 4 Results and Discussion 63 4.1 Self-assembled polystyrene crystal films 63 4.2 Master design 65 4.3 Hierarchical structures 68 4.4 Soft-lithographic imprinting 70 4.5 Highly transparent microstructured PDMS films 72 Chaper 5 Conclusions 111 References..................................113 | |
| dc.language.iso | en | |
| dc.subject | 微奈米結構 | zh_TW |
| dc.subject | 超疏水性 | zh_TW |
| dc.subject | 蓮花效應 | zh_TW |
| dc.subject | Lotus effect | en |
| dc.subject | Micro/Nano structure | en |
| dc.subject | Superhydrophobic | en |
| dc.title | 應用於透光性基板之疏水性微奈米結構表面改質 | zh_TW |
| dc.title | Study of Micro/Nano Structure Effects on Hydrophobic Surfaces With High Transparency | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 96-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 鄭友仁,林招松 | |
| dc.subject.keyword | 超疏水性,蓮花效應,微奈米結構, | zh_TW |
| dc.subject.keyword | Superhydrophobic,Lotus effect,Micro/Nano structure, | en |
| dc.relation.page | 114 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2008-07-27 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| Appears in Collections: | 機械工程學系 | |
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| File | Size | Format | |
|---|---|---|---|
| ntu-97-1.pdf Restricted Access | 6.92 MB | Adobe PDF |
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