2017 Fiscal Year Final Research Report
Study on photoresponsive wettability switching by combination of topological surface structure and photo-generated carrier control
| Project/Area Number |
16K17505
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nano/Microsystems
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Research Collaborator |
KONISHI Satoshi 立命館大学, 理工学部, 教授
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | 酸化チタン / ルチル型結晶構造 / 表面幾何学構造 / Cassie-Baxter表面 / 光触媒 / 光応答性 / 濡れ性スイッチング |
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| Outline of Final Research Achievements |
Since surface tension becomes more dominant physical factor in microfluidic phenomenon, capillary pumping has been utilized as a passive liquid manipulation mechanism for lab-on-a-chip applications. In this project, widening of switching range of photoresponsive wettability on TiO2 photocatalyst was studied by applying topological micro-structure to its surface. The wettability reversal time was shorten from 180 min to 6 min by employing micro pillar array with T-shaped cross-sectional structure. Also, the rutile-TiO2 surface prepared by sputtering at higher substrate temperature (>500 C) showed wider and faster photoresponsive wettability change under UV irradiation with DC-bias voltages at around 0.9V.
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| Free Research Field |
薄膜材料，表面界面物性
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