Wetting morphologies at microstructured surfaces Export

@article{citeulike:5997527, abstract = {10.1073/pnas.0407721102 The wetting of microstructured surfaces is studied both experimentally and theoretically. Even relatively simple surface topographies such as grooves with rectangular cross section exhibit a large variety of different wetting morphologies as observed by atomic force microscopy. This polymorphism arises from liquid wedge formation along the groove corners and from contact line pinning along the groove edges. A global morphology diagram is derived that depends only on two system parameters: () the aspect ratio of the groove geometry and () The contact angle of the underlying substrate material. For microfluidics, the most interesting shape regimes involve extended liquid filaments, which can grow and shrink in length while their cross section stays essentially constant. Thus, any method by which one can vary the contact angle can be used to switch the length of the filament, as is demonstrated in the context of electrowetting.}, author = {Seemann, Ralf and Brinkmann, Martin and Kramer, Edward J. and Lange, Frederick F. and Lipowsky, Reinhard}, citeulike-article-id = {5997527}, citeulike-linkout-0 = {http://dx.doi.org/10.1073/pnas.0407721102}, citeulike-linkout-1 = {http://www.pnas.org/content/102/6/1848.abstract}, citeulike-linkout-2 = {http://www.pnas.org/content/102/6/1848.full.pdf}, citeulike-linkout-3 = {http://view.ncbi.nlm.nih.gov/pubmed/15677720}, citeulike-linkout-4 = {http://www.hubmed.org/display.cgi?uids=15677720}, day = {8}, doi = {10.1073/pnas.0407721102}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, keywords = {morphology, nanostructured, pinning, s, wetting}, month = {February}, number = {6}, pages = {1848--1852}, posted-at = {2009-10-23 12:35:19}, priority = {2}, title = {Wetting morphologies at microstructured surfaces}, url = {http://dx.doi.org/10.1073/pnas.0407721102}, volume = {102}, year = {2005} }

TY - JOUR ID - citeulike:5997527 L3 - citeulike-article-id:5997527 N2 - 10.1073/pnas.0407721102 The wetting of microstructured surfaces is studied both experimentally and theoretically. Even relatively simple surface topographies such as grooves with rectangular cross section exhibit a large variety of different wetting morphologies as observed by atomic force microscopy. This polymorphism arises from liquid wedge formation along the groove corners and from contact line pinning along the groove edges. A global morphology diagram is derived that depends only on two system parameters: () the aspect ratio of the groove geometry and () The contact angle of the underlying substrate material. For microfluidics, the most interesting shape regimes involve extended liquid filaments, which can grow and shrink in length while their cross section stays essentially constant. Thus, any method by which one can vary the contact angle can be used to switch the length of the filament, as is demonstrated in the context of electrowetting. IS - 6 JF - Proceedings of the National Academy of Sciences of the United States of America EP - 1852 TI - Wetting morphologies at microstructured surfaces VL - 102 SP - 1848 KW - morphology KW - nanostructured KW - pinning KW - s KW - wetting AU - Seemann, Ralf AU - Brinkmann, Martin AU - Kramer, Edward AU - Lange, Frederick AU - Lipowsky, Reinhard PY - 2005/02/08/ UR - http://dx.doi.org/10.1073/pnas.0407721102 ER -