Hi everyone, I want make SU8 surface hydrophilic. I know O2 plasma will do the job, but just temporarily hydrophilic. I want to make SU8 keep hydrophilic for a while (at least a week). Myabe I can modify the SU8 surface with silane? What specific silane should I use? In addition, I want the SU8 end up with a negative charge, so amine-silane will not work. Thank you!