Hi TJ,

BSA, bovine serum albumin, can block some porous matrix of PDMS. By
incubation concentrated BSA in channels overnight, adsorbed/absorbed
Rhodamine can be reduced.

HC

On Sat, Sep 19, 2009 at 8:03 PM, 김태진  wrote:

> Hi all,
>
> I've been trying to flow in fluorescence die (Rhodamine) in a PDMS
> microfluidic channel to do some flow characterizations.
>
> The problem is, the vicinity of the pdms channel became bright as well
> after about 5 minutes.
>
> It almost seemed like that the fluoresent die was diffused into the pdms.
>
> Is there a way to solve this problem?
>
> Thanks!
>
> TJ

Research Assistant,
Mech. Eng., URI
92 Upper College Rd.,
Kingston, RI 02881

Office Tel : 401-874-2247