FIG. 5.
Attachment of Ulva zoospores to COOH/CH3- and OH/CH3-SAMs with similar cosθAW values. (A) Schematic representation of patterned COOH/CH3- and OH/CH3-SAMs on a single slide. A gold film supporting a CH3-SAM was laser etched to produce four divided squares (b), each 10 by 10 mm and containing two electrically isolated elements. Electrochemical desorption of the CH3-SAM from each element and subsequent exposure to solutions of either COOH/CH3-thiols (c) or OH/CH3-thiols (d) resulted in a series of adjacent paired SAMs with similar contact angles. (B) Attachment of Ulva zoospores as a function of cosθAW. Each point is the mean of 30 fields of view, 10 from each of three replicates; bars show 95% confidence limits.