pubs.acs.org/Langmuir © 2010 American Chemical Society
Tunable Wettability and Rewritable Wettability Gradient from Superhydrophilicity to Superhydrophobicity Liming Wang, Bo Peng, and Zhaohui Su* State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China Received March 16, 2010. Revised Manuscript Received April 12, 2010 A simple method for the fabrication of tunable surfaces with wettability that can be manipulated rapidly and reversibly from superhydrophilicity to superhydrophobicity is reported. A polyelectrolyte multilayer (PEM) was deposited on a rough substrate, and via ion exchange of the counterion in the PEM, the water contact angle of the surface was switched between
