期刊
SOFT MATTER
卷 5, 期 14, 页码 2759-2765出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b900504h
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资金
- Alexander von Humboldt (AvH) Foundation
- Federal Ministry of Education and Research of Germany (BMBF)
Saccharides play crucial roles in a wide variety of biological and psychological processes, and their sensing and control are important in many medical, diagnostic, and therapeutic contexts. We demonstrate here that a novel polymer film can be made to switch between superhydrophobicity and superhydrophilicity on exposure to sugar solutions, due to hydrogen-bonding interactions between thiourea and PBA units in the polymer. This wettability switching is reversible and the contact angle change shows a good linear relationship with the logarithm of the sugar concentration, as well as being distinctly different for different sugars. Furthermore, exposure to the sugar solution is accompanied by a reversible expansion-contraction of the polymer particles. Therefore, this system may find broad applications in other related fields including controllable drug release, microfluidic devices and biochips.
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