在 Si 上制备超疏水表面的新方法。

Novel method of producing a superhydrophobic surface on Si.

机构信息

Materials Department, University of California at Santa Barbara, Santa Barbara, California 93106, USA.

出版信息

Langmuir. 2010 Mar 2;26(5):3637-40. doi: 10.1021/la903074z.

PMID:19928882

Abstract

Superhydrophobic surfaces were produced on silicon substrates coated with gold, which facilitates the formation of SiO(2) protrusions on the Au surface in air at low temperatures. The roughness of SiO(2) increased with the oxidation period at, for example, 150 degrees C. When the SiO(2) surface is alkylated with dodecanol, the contact angle of water exhibited a transition from the Wenzel (complete penetration) wetting state to the Cassie (incomplete penetration) wetting state with increased roughness. It was discovered that Cassie wetting was optimized after a specific oxidation period at 150 degrees C to produce an advancing contact angle of approximately 170 degrees and a receding angle of approximately 160 degrees.

摘要

在涂覆有金的硅衬底上制备了超疏水表面，这有利于在低温下空气中在 Au 表面上形成 SiO(2) 突起。例如，在 150°C 时，SiO(2)的粗糙度随氧化时间的增加而增加。当 SiO(2)表面用十二醇进行烷基化时，水的接触角从 Wenzel（完全渗透）润湿状态转变为 Cassie（不完全渗透）润湿状态，粗糙度增加。发现经过 150°C 下特定的氧化时间优化后，Cassie 润湿状态，产生大约 170 度的前进接触角和约 160 度的后退角。