The 300K nanosep membranes that Jess ordered came in so I ran a single set of three membranes at 21.63psi to compare their hydraulic permeability values to those of the 100K microcon membranes.
As expected the 300K nanosep membranes have a much larger hydraulic permeability then that of the 100K microcons; approximately a factor of 5 greater.
Last week when I reported no membrane breakage after a week of HUVEC culture, I showed a phase micrograph on day 7. This week I tracked the HUVECs a bit more closely with the microscope. This is 10X, HUVEC P5, initial seeding density of 32,500 cells/insert. I tried to capture approximately the same area on…
Production this week yielded mixed results. We ran eight wafers through four different RTP temperatures with/without the susceptor. We wanted to test our theory that temperature non-uniformity inside the chamber was causing the morphology change across the wafer. This proved to not be the case! Wafers that were treated with and without susceptor showed the…
I have been using MatLab to analyze the pores in the SC wafers. Here are the results from my analyses: To take a first look, I simply plotted four characteristics: average pore size, porosity, cut-off pore size, and mean roundness against the wafer number. Notice that the blue dots are the b wafers. Excel would…
This paper (Variance of Streaming Potential) examines the sources of error in zetapotential measurements. Jess and Zydney both cite it in their EO papers as a source of experimental procedure – in particular this paper found that waiting for the pressure to equilibrate at discrete timepoints works better than a continuous ramp-up in pressure. From…
I attempted to clear the large format lift-off devices (from Josh). I was unable to clear, in a reasonable amount of time (< 2 hours) by pumping IPA. So I switched to PBS then Blood and blue-dyed PBS (dye is estimated to be between 10 nm and 500 nm, obviously the amount of dye near…
I recently repeated a chemical stability test of RTPed (5 min in Ar at 800C) samples from W613, which has the 30 nm pnc-Si layer. In this study I used DMEM +10% FBS as the culture media without cells. Previously RTP treatment of samples from this wafer survived about 7 days. In this iteration of…