期刊
ACS NANO
卷 14, 期 7, 页码 9166-9175出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c04670
关键词
superantiwetting; hierarchical; low aspect ratio; cylinder arrays; colloidal lithography; superoleophobic
类别
资金
- National Basic Research Program of China (973 program) [2012CB933800]
- National Science Foundation of China (NSFC) [91123031]
A superantiwetting surface based on low-aspectratio hierarchical cylinder arrays (HCAs) was successfully obtained on a silica substrate by colloidal lithography with photolithography. Colloidal lithography is a technique involving transfer of a pattern to a substrate by etching or exposure to a radiation source through a mask composed of a packed colloidal crystal, while photolithography is utilized by which a pattern is transferred photographically to a photoresist-coated substrate, and the substrate is subsequently etched. The surface provides an alternative approach to apply aligned micro-nano integrated structures with a relatively low aspect ratio in superantiwetting. The obtained HCAs successfully integrated micro- and nanoscale structures into one system, and the physical structure of the HCAs can be tuned by modulating the fabrication approach. Using a postmodification process, the underwater-oil wetting behavior of cylinder-array based surfaces can be easily modulated from the superoleophobic state (an oil contact angle (OCA) of 161 degrees) to oleophilic state (an OCA of 19 degrees). Moreover, the underwater-oil wettability can be reversibly transformed from the superoleophobic state (an OCA of approximately 153 degrees) into the oleophilic state (an OCA of approximately 31 degrees) by grafting stimuli-responsive polymer (PNIPAAm) brushes onto this specific hierarchical structure. Due to the temperature-responsive property, modifying the surface with PNIPAAm provides a possibility to control the oil wettability (repellent or sticky) by temperature, which will benefit the use of HCAs in oil-water separation and other application fields.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据