Air Permeability Update

This is a follow-up post to “Protein Assay Test.” I realized that I never posted the final stag of my experiments, in which I finally got BSA to go through the membranes. In “Protein Assay Test,” I described several experiments that I set up to see if I could get BSA to pass through a…

The goal of this project is to determine the viability of PEG as a structural support for large area nano porous membranes. This would enable lift-off vs. the current method of etching through the wafer. The ideal properties are that the structure can withstand an aqueous solution for many days without peeling off or dissolving,…

UV Ozone treated W404 sample testing (benchtop) : In EGM In L15 In DMEM In each row, the first two samples (from left) are UV Ozone treated whereas the next two are not.It can be observed that there is no significant difference in discoloration due to the treatment after ~15 hrs. Note: The starting color…

As part of my thesis, I am trying to get a non-fouling pattern on a substrate which resembles our porous membranes to investigate cell behavior including cell adhesion and migration and to compare with our previous results which was obtained on porous membranes. This study can separate the role of pore edges and disrupted surface…

There’s been lots of discussion about “non-porous” membranes and the possibility that they are actually porous.  By “non-porous”, I mean that a TEM of that membrane doesn’t have obvious pores by pore processing/our eyes.  This could mean a couple things: either the pores are so small that they are hard to resolve by TEM or…

After last week’s post detailing the problems I’ve been having with my streaming potential setup, Jirachai was kind enough to come by the U of R last friday to look at my device. We banged our heads into the wall for a good two hours, but the drifting potentials and apparent insensitivity of the streaming…