Hello Li Xiang, Could you please tell me how can i make the least hydrophilicity PDMS material? such as the ratio and temperature? Thanks a lot Regards At 2011-05-13 23:13:07,"XIANG LI"wrote: >Hello there, > >My group has fabricated a different ratio of PDMS structure(10:1 5;1 >20:1). Without plasma treatment or chemical coating they are all >pretty hydrophobic. The contact angle can be at least 90 degree. > >Best, > >Xiang