Year: 2011
Journal: Advanced materials 2011, 23, (26), pp. 2911-2914, 20121211
Authors: Henrikki Mertaniemi, Ville Jokinen, Lauri Sainiemi, Sami Franssila, Abraham Marmur, Olli Ikkala, Robin H. A. Ras
Organizations: Molecular Materials, Department of Applied Physics, Aalto University (formerly Helsinki University of Technology), Puumiehenkuja 2, FI-02150 Espoo, Finland; Department of Materials Science and Engineering, Aalto University (formerly Helsinki University of Technology), Vuorimiehentie 2, FI-02150 Espoo, Finland; Division of Pharmaceutical Chemistry, University of Helsinki, Viikinkaari 5E, FI-00790 Helsinki, Finland; Department of Chemical Engineering, Technion – Israel Institute of Technology, 32000 Haifa, Israel
We demonstrate a simple yet efficient approach for droplet transport, in which the droplet is moving on a superhydrophobic surface, using gravity or electrostatic forces as the driving force for droplet transportation and using tracks with vertical walls as gravitational potential barriers to design trajectories. We further demonstrate splitting of a droplet using a superhydrophobic knife, and drop-size selection using superhydrophobic tracks with a local widening.
