Thank you Gareth, Kirth and Nichols. We are currently gluing the capillaries with siliconic glue since we are concerned about biocompatibility of epoxy, unfortunately the siliconic glue does not provide sufficient sealing. We are just looking to some literature to find out whether epoxy is compatible with our procedures or not. Again thank you very much. Ciro Chiappini Graduate Research Assistant Biomedical Engineering - University of texas at Austin Dr. Ferrari Nanomedicine Group