you can try coating hydrofilic areas with teflon, parylene etc to make the
hydrofobic

Shay Kaplan

Yanying Feng wrote:

> Dear Lady or Gentlmen:
>      I want to form some surface pattern of hydrophility in microchannels.Is
there any method to make some domains hydrophobic and the other hydrophilic in
silicon microchannels? The microchannel is constructed by bonding a silicon
substrate with etched channels to a Pyrex glass coverslip. Thank you any way!
>
>
> With best regards
>
>             Yanying Feng
>             [email protected]
> ________________________________________________________
> MEMS Lab
> Department of Precision Instruments and Mechanology
> Tsinghua University
> Beijing
> P. R. China
> 100084
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