1236 npMgF2 Temp Series structural comparisons to 1085 npMgF2
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Still trying to reproduce Joe’s large pore material on SEPCONs using NSN stacks. This post has data from two wafers with 30/50/30 and 30/100/30 NSN. RTP is 1000C 50C/s for 1min. Nitride is etched off by placing samples in 50% HF for 3.5 minutes. (~30s after that the films start to lift off) I start…
Prior to my qualifying exam about a month ago, I put together a simple model of transport (detailed in this previous post) across a nanomembrane that incorporated electrostatics as well as terms describing both convective and diffusive transport across the membrane. It was a useful model, but ultimately limited, as shown by the following image:…
As I am hoping to promote tighter junctions between endothelial cells in my device, I am trying to create an environment that produces shear stress on the endothelial cells. Shear stress up-regulates the pathways that promote tight junctions (Tzima et al 2005, Dejanna et al 2004). The value of the quantity is somewhere around 6…
During the recent visit of Greg Madeijski to our Institute of Biophysics, Imaging & Optical Science (IBIOS) here in Nottingham we had the opportunity to try imaging cultures of cells on several nanoporous membranes, including CytoVu’s and also the unsupported TEM grids without SiN. Here is a short summary of our adventures, along with some…
All of this talk about Zeta Potentials, electro-osmosis and electric double layers got me thinking about these phenomenon in relation to discoloration. We’ve known that salts accelerate discoloration, and we know that bicarbonate solutions accelerate discoloration as well. I explained the bicarbonate issue based on the equilibrium between bicarbonate ions and hydroxyl ions (pH). We…
A study of membrane deflection has been conducted using the Veeco Wyco optical profiler. This is the first time the Veeco has been used to obtain quantitative data describing membrane deflection. This type of analysis will be useful for several reasons: –It will provide a numerical measure of maximum deflection and deflection vs. position for…