This is preliminary data for air permeability in track-etched membranes for membranes with different pore radius.
For comparison here is a table of the performance characteristics for TE membranes
Measured data is of the same order as official TE membranes data.
In order to support the idea that RTP treatment does not change membrane pore characteristics (as shown by Anant in the rhodamine diffusion study) I processed TEM samples that were not treated, RTPed in Ar, for 5 minutes at 800C, and RTPed in O2 at 800C for 5 minutes (I believe this was not a…
Based on the results obtained yesterday with the closed flow cell we reran another trial today. The closed flow system we tested today was bound using UV Ozone treatment, surprisingly this system created a relatively strong bond despite our resent results. Once the UV Ozone treatment was complete and the system had bound vacuum grease…
For my BBB project, I’ve wanted to get nice images of glial cells and endothelial cells on opposite sides of pnc-Si membranes to demonstrate 1) optical transparency 2) that both cell types are in focus (and thus right on top of each other). I’ve gotten some images like that in phase contrast but I also…
Our recent work using NPN to separate free IgG from 20 nm NPs has shown that we can pass liquid under either forward or reverse configurations using the centrifuge. We had thought that there would be greater resistance in the forward orientation due to cake layer formation. We had found high resistance to flow in…
In an effort to imitate Sepcon, I applied nail polish on two samples covering the edges and the back side (well side) and compared its discoloration to Sepcon format and w/o polish sample in 2D format. I used two polished samples in which I covered the edges in both but the back side was not…
Today I made my first attempt at depositing aluminum oxide on pnc-Si using URInc’s Cambridge Nanotech’s Savannah 200 atomic layer deposition tool. Ritala and Leskela give a nice primer on ALD theory. ALD relies on layer-by-layer growth of film by reacting a precursor with the surface of interest. In this particular system, we react trimethylaluminum…
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At what pressure was the data in the table acquired?