Alec’s Proposal Exam Documents

The Barcikowski lab sent us generous amounts of three different samples – gold, platinum, and bioconjugated gold. Each of the samples was created via laser ablation, resulting in fairly polydisperse (4-50nm diameter) nanoparticles for the pure metal and significantly less polydisperse (2-20nm, not including bound ligand) nanoparticles in the case of bioconjugated gold. As before,…

We’ve known for some time that the sieving coefficient of our membranes changes over time. The reason for this is that at the start of the separation the concentration just above the membrane is the same as the bulk concentration, but as more and more fluid begins to pass through the membrane we get concentration polarization, and the membrane…

One of the other suggestions from Angela Glading at lab meeting a while ago was to quantify the vacuoles on different culture areas.  So, I selected images from 3 different experiments (all at day14 of growth) and counted the number of cells which expressed vacuoles on different areas.  I then used my mask code in…

In my last post we determined that there is an inverse relationship between porosity and burst pressure. I continued to dig further into other factors that affect the burst pressure of the membrane. Pure silicon was used in all the measurements. I measured the burst pressure of many samples that differed in properties that includes…

The group in the attached paper have found a way to form pnc-Si using PECVD.   They use a 300-15-300 nm OSO stack with a 850 C (50 C/s, 30 s) RTP to form ~13 nm pores.  SiMPore attempted this in the past, but was not able to form pores.  Using PECVD would be faster than our…

I have tested the new diffusion chamber shown in a yesterday’s post. The idea of our original design works. But there are several problems with this prototype: – Paul used a very thick material to build the clamp, which blocks the objective of the microscope system; – The upper hole in the substrate, designed for…