Hello,

You might want to try "Thermal surface reconstruction" which means the treated
surfaces will covert from hydrophilic to hydrophobic after a certain time. You
also can play some parameters, such as temperature, to speed this process. The
following paper is FYR.

http://www.lehigh.edu/~wez6/S&A_Lehigh_ESCW.pdf

Good luck,

Lydia


Quoting "\"·ù°ÇÈ£\"" :

>
>  Hello?
>  We want to konw about following thing.
>
>  We make the microchannel by using the PDMS and Glass.
>  PDMS and Glas together was bonded by plasma treatment(Plasma Asher).
>  So, the surface of PDMS and Glass is changed into hydrophilic.
>  We want to have a hydrophobic PDMS microchannel surface afther Plasma
> treatment.
>  Plasma treatment is good for fusion bonding, but the surface is still
> hydrophilic.
>
>  Could you explain the method which the surface can be changed from
> hydrophilic into hydrophobic?
>
>  Above all thank you for reading my E-mail, I will wait your answer. thank
> you.
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