Previously I had posted a chart depicting the permeabilities of SepCon membranes from w310. I went back and noticed some errors in the equations. Here is an updated version of that chart. Also included is a sample where I used…

Last week I performed spins with SepCons from w310. I tracked permeability and tried to perform some separations with proteins. w310 had high air permeability (link), but from my diffusion data it looked looked like the cutoff was possibly between…

I ran the same 100K microcon system through numerous pressure ranges and put together the spread of hydraulic permeability results.These results show that the hydraulic permeability of the microcon membranes decrease with increasing pressure. Once I finished running the tests…

I think the consistently low flow rates are a real bottleneck for all our fluid based experiments and must be overcome. On the production side, we are really pushing the limits of our capabilities to produce the current membrane geometry,…

This is some really preliminary data that I hope to add to in the next couple of days. Yesterday I prepared 4 SepCon samples from wafer 310. I spun them at 3.3 psi for 2 hours with just PBS. I…

Using Mike B.’s MATLAB script, I was able to generate some histograms and stats for wafer 187, 310, 319 and 320. I excluded the “small pore background”, as I do not believe these features go all the way through the…

I only added coordinates on each data point.

Production this week focused on varying the RTP temperature of membranes deposited under identical conditions. wafer 316 – 800 C RTP (120 s) (0,-5) @ 50 kx Material still appears to be amorphous. Wrinkled at edges. wafer 318 – 900…

These are the graphs with burst pressures for wafers 187, 189, 310, 312 and updated burst pressure bookMembrane_Burst_Book.xls The orange columns in the graphs indicate samples that I used for air permeability tests before.

Below are results for air permeability tests I took on wafers w302, w304, w187, w189, w310. The X axis is the position of a sample on the wafer (from inside to outside).Samples form wafer 189 passed no air and the…