This communication describes the use of polyelectrolyte multilayer as a preformed matrix in electrochemical deposition to adjust the morphology of gold clusters, and only the surface covered with dendritic gold clusters shows a super-hydrophobic property, with the contact angle above 150 degrees and the tilt angle less than 1.5 degrees , after the surface further chemisorbed with a self-assembled monolayer of n-dodecanethiol.

though functional, yielded lower currents (for similar device geometry) than the mixed-metal contacts, and therefore inferior device characteristics.Characterization: Thermogravimetric analysis (TGA) scans were performed using a TA Instruments TGA-2950. The TGA was run using a 2 C min ±1 ramp rate and a flowing nitrogen atmosphere. Powder X-ray diffraction was performed using a Siemens D5000 diffractometer. MEIS analysis was performed with 200 keV protons using an electrostatic energy analyzer at a scattering angle of 120. The large scattering angle was chosen to minimize overlap between the In and Se peaks. The system was calibrated to better than 5 % accuracy using a SiO 2 film of known thickness. TFT devices were tested using a Hewlett±Packard 4145B semiconductor analyzer, employing a medium integration time (16.7 ms) during the measurement. Devices exhibited substantial sensitivity to air exposure after fabrication, with the mobility and current being substantially reduced upon extensive exposure to the ambient atmosphere (whether or not the device was being operated). Consequently, devices were maintained and measurements were performed in a nitrogen-filled dry box. The wetting property of a solid surface is one of the most important aspects in both theoretical research and industrial applications. Two extreme cases, namely superhydrophobic surfaces with a contact angle (CA) larger than 150 and superhydrophilic surfaces with a CA lower than 10, have attracted extensive interest considering their intriguing promise in selfcleaning materials. [1,2] In general, superhydrophobic surfaces can be obtained by controlling the roughness and topography of hydrophobic surfaces, [3] while superhydrophilic surfaces can be achieved by utilizing a capillary effect [4] on hydrophilic surfaces. Stimuli-responsive surfaces, [5] the wettability of which can be reversibly controlled, have been realized by various stimulus methods including light irradiation, [6] electric field, [7] thermal treatment, [8] and so on. Recently, by introducing stimuli-responsive materials into special rough surface structures, Jiang and co-workers have successfully demonstrated reversible switching between superhydrophobic and superhydrophilic surface properties triggered by temperature or UV irradiation. [9] Surface materials with wetting properties responding to certain conditions of water, such as pH value, electrolyte, and so on, are very important in controlled microfluidic switches, controllable separation systems, etc. For example, Whitesides and co-workers have demonstrated a pH-COMMUNICATIONS