File:Saffman-Taylor instability and EHD pillars formed in a polymer. 200x magnification reflected light.tif
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[edit]DescriptionSaffman-Taylor instability and EHD pillars formed in a polymer. 200x magnification reflected light.tif |
English: The dark circles are micro-pillars formed by an electrohydrodynamic instability in a thin polymer film. A liquid polymer is coated onto an electrode to be used in a parallel plate capacitor. When a voltage is applied across the two capacitor electrodes, the pillars grow in the liquid polymer. This is a result of electrohydrodynamic instabilities at the interface between the polymer and air in the gap between the two electrodes. The pillars are 10x smaller than the width of a human hair. The finger like patterns are formed when a less viscous fluid (here the air) displaces another of higher viscosity (the polymer).The colours in the image are the result of thin film interference where light interacts with very thin layers of material. The resulting patterned surfaces are used for optics and tissue culture applications. |
Date | |
Source | Own work |
Author | Claire Trease, Kingston University |
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[edit]I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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This image was uploaded as part of European Science Photo Competition 2015. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:11, 30 November 2015 | 2,048 × 1,536 (7.28 MB) | K1167189 (talk | contribs) | User created page with UploadWizard |
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Width | 2,048 px |
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Height | 1,536 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Number of components | 3 |
Number of rows per strip | 2 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Image-Pro Express |
File change date and time | 04/17/2015 03:03:49.234 PM |