The image below was taken with UR’s new S/TEM, the FEI Technai F20. It has the capability of resolving lattice images which should benefit the materials development effort. However, we will still rely on Karen’s TEM for most of our imaging since the throughput is higher on that tool.
Introduction Sepsis related projects had a decent presence at this years Biomedical Engineering Society (2019). I will detail a few of the talks I found most relevant to our group and research. Nanomedicine for Acute Criticial Illness by Dr. Jacob Brenner (U Penn Medical) Dr. Brenner is a practicing physician working on ICAM-1, PECAM-1, and…
For last 1.5 years, I have been working on developing a COMSOL model to understand how the geometry of pncSi chips affects the TEER values when cells are growing on them. I addressed this issues in some of my previous blog posts. What was lacking in the previous post (which I thought was the concluding…
Wafer 1148 was produced roughly around the same time that the wafer I used to make my oldest MgF2 material (wafer 1085) was produced. We know that some of the NPN material from that time was not etched all the way through, creating pores that look like a ‘bowl-with-hole’. I believe the shape of the…
As we run our CCD (Central Composite Design for Optimizing SERS Substrates, SERS Measurements on 150C, 250C, 350C 1236 npMgF2), we have also been gathering TEM/SEM structural information about pore distributions and MgF2 grain structure. This post contains images about materials and compares them to information we know about wafer 1085, one of our original MgF2…
This post has been a long time coming, but I have finally (essentially) finished all the work for Aim 1 of my thesis. (Credit to Dan for helping with part of it and getting a thesis along the way, see his post here: https://trace-bmps.org/critical-flux-of-ultrathin-silicon-membranes-in-tangential-flow-filtration-of-protein-solutions/) Up until this point, I have been attempting to validate my…
Hi all, This is a “take two” of the mock figure for our manuscript titled “Porous substrates influence early endothelial migration and the associated fibronectin fibrillogenesis”. Many new figures are produced based on the reviewer suggested experiments. It is likely that we will have the word”early” from our manuscript title. PS: The old, raw mock…
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This is great news! The image is fascinating- there is no clear evidence for this amorphous phase here- and the apparent shape of the nanocrystals is very interesting- not at all spherical, it seems! Do you have more of these pictures? I think they can give us important clues on how the pores form.
Is the low throughput due to inexperience with the tool or is it the nature of the tool?
I agree, this material is highly crystalline. (On a similar note, Brian said that we need to be within +/- 0.5 degrees of the Bragg condition to see diffracting crystals.) I was only able to look at one sample today because it was the first time I touched the tool and we were being trained.
Throughput is limited on this TEM because you can only load one sample at a time (vs. two w/ Karen’s) and the pump time is significantly longer because of the higher vacuum requirement.