New lower price for Axon II ($78) and Axon Mote ($58).
0 Members and 1 Guest are viewing this topic.
What exactly are you repelling water from?Remember that extremely high voltages near your microcontroller will never end well . . .Thinking outside the box . . . have you considered maybe air jets or hydrophobic creams?
A Reversibly Switching Surface Joerg Lahann,1 Samir Mitragotri,2 Thanh-Nga Tran,1 Hiroki Kaido,1 Jagannathan Sundaram,2 Insung S. Choi,1* Saskia Hoffer,3 Gabor A. Somorjai,3 Robert Langer1 We report the design of surfaces that exhibit dynamic changes in interfacial properties, such as wettability, in response to an electrical potential. The change in wetting behavior was caused by surface-confined, single-layered molecules undergoing conformational transitions between a hydrophilic and a moderately hydrophobic state. Reversible conformational transitions were confirmed at a molecular level with the use of sum-frequency generation spectroscopy and at a macroscopic level with the use of contact angle measurements. This type of surface design enables amplification of molecular-level conformational transitions to macroscopic changes in surface properties without altering the chemical identity of the surface. Such reversibly switching surfaces may open previously unknown opportunities in interfacial engineering. 1 Department of Chemical Engineering, Massachusetts Institute of Technology (MIT), 45 Carleton Street, Cambridge, MA 02139, USA. 2 Department of Chemical Engineering, University of California at Santa Barbara, Santa Barbara, CA 93106, USA. 3 Department of Chemistry, University of California at Berkeley, Material Science Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA. * Present address: Department of Chemistry and School of Molecular Science (BK21), Korean Advanced Institute of Science and Technology, Daejeon 305-701, Korea.