期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 15, 页码 7736-7743出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp401559y
关键词
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资金
- Natural Science and Engineering Research Council of Canada (NSERC)
- Simon Fraser University
- China Scholarship Council
We have explored how surface morphology and structure affect wetting properties of electrodeposited oxide thin films notwithstanding chemical modifications. Micro-stripes of self-assembled monolayers (SAMs) on gold were prepared using a microcontact printing (mu CP) technique, which served as molecular templates to guide the electrochemical deposition of zirconia in aqueous solution. The wetting properties of the thus-prepared zirconia oxide thin films are shown to be tunable; i.e., a wide range of wettabilities from hydrophilic to superhydrophobic can be obtained by simply varying the SAM template and the electrodeposition conditions (potential scan rate and number of cycles). In particular, a two-tier micro/nanoscale roughness was achieved on the gold substrate patterned with alternating stripes of 1-octadecanethiol and 6-mercapto-1-hexanol SAMs, which leads to a superhydrophobic surface (water contact angle similar to 150 degrees). Of great significance is the demonstrated ability herein to convert an intrinsically hydrophilic into a hydrophobic surface by changing the conditions for materials fabrication, which does not involve any chemical modifications.
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