The Key Lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
Langmuir. 2010 Jan 19;26(2):1191-8. doi: 10.1021/la902332q.
We report an approach for fabricating a tunable wettability surface by electroless gold plating on poly(dimethylsiloxane) (PDMS). A two-layer structured gold film with a tight layer and a loose layer can be obtained on the surface of a PDMS chip when the PDMS chip is immersed in a gold plating solution at 30 degrees C for 4 h. Its wettability can be rapidly switched between superhydrophilicity and superhydrophobicity by plasma and heat treatments without any self-assembled monolayer, and the superhydrophobicity can be even changed from the gecko-foot-hair-like character to the lotus-leaf-like character. Benefiting from the various wettabilities of the prepared gold/PDMS composites, protein patterning is successfully achieved on a patterned superhydrophobic/superhydrophilic gold/PDMS composite; a superhydrophobic needle for transferring supersmall water droplets (1 microL) to a superhydrophobic surface is successfully fabricated.
我们报告了一种通过化学镀在聚二甲基硅氧烷（PDMS）上镀制可调节润湿性表面的方法。当 PDMS 芯片在 30°C 的镀液中浸泡 4 小时时，其表面可以获得具有紧密层和疏松层的双层结构金膜。通过等离子体和热处理，无需任何自组装单层即可快速在超亲水性和超疏水性之间切换其润湿性，甚至可以将超疏水性从壁虎足毛状转变为荷叶状。得益于所制备的金/PDMS 复合材料的各种润湿性，成功地在图案化的超疏水/超亲水金/PDMS 复合材料上实现了蛋白质图案化；成功制备了用于将超小水滴（1μL）转移到超疏水表面的超疏水针。
