[mems-talk] Dissolving carboxylate modified micro spheres stick to the PDMS channel walls

[Mohammed Asfer]

Dear all

    I am using carboxylate modified micro spheres(1.0 um, nile red
    fluorescent, Invitrogen, molecular probes) for microPIV
    measurements for flows through the microchannel made of PDMS. But
    during flow, some of the the above fluorescent microspheres stick
    to the walls of the PDMS channel. As a result it becomes
    difficult to reuse the above channel. So can anyone tell me what
    solvents can be used to dissolve those particles from the channel
    walls without any changes in the microchannel features.

    Thanks in advance for those who will reply.
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With regards & Best wishes

Mohammed Asfer