Webb Visit Slides

Now we already confirmed that pores are able to form in both oxide/silicon/oxide and nitride/silicon/nitride system. Here comes an interesting question- how about nitride/silicon/oxide and oxide/silicon/nitride system? In the past week, another two different stacks including SiN(30nm)/ a-Si(25nm)/SiO2(30nm) and SiO2(30nm)/a-Si(25nm)/SiN(30nm) were tested. The nitride film was deposited with 25 W bias and the silicon with…

For last many months, I am working on neutrophil migration experiments to develop protocols to inhibit them from traversing the basement membrane. My previous blogs are here and here. I want to prevent neutrophils from crossing the endothelial basement membrane (BM), and record the changes in TEER and try to correlate with the gain in…

To follow up on some of Dave’s work – I was curious if the ALD alumina affects the strength of pnc-Si membranes. Punchline: 2.5 nm of Alumina seems to increase the burst pressure, while 5.0 nm reduces the burst pressure. Methods: As part of routine QC, we had already measured robustness on 6 SepCons to…

[presentation] HUVEC migration and fibronectin

A few of the newest SC wafers came back with intact samples without any pinholes. First here is a list of the experiments that we want to do in our lab with intact/pinhole free membranes 1. Protein separations – Requires >10 samples per wafer (preferably even more) for replicates of separations in both pressure and…

I’ve tested several membrane types with the streaming potential apparatus in order to calculate zeta potential.  Here are the results: All materials in the above chart have negative zeta potentials.  Pnc-Si seems to have the highest overall potential, followed by PES then cellulose.  Cellulose is prone to cracking and bursting at pressure above 7 PSI….