W613, the wafer with 30 nm thick pnc-Si that is oddly etched to form “H” shaped membranes, was tested for burst pressure and attempted to measure air permeability. When doing air permeability all samples broke, meaning are very weak. This was demonstrated in the burst pressure values, shown below. I guess the large, oddly shaped…
The production crew recently delivered W620 to the lab, which was created to mimic W504 (and W612). W620 shows high burst pressure and has air permeability comparable to W504/612.
I made a small presentaion for tomorow. Promise to upload it on the web tomorrow (can’t make ftp work right now). polymer2
Upload just for future reference. This includes the data of KMnO4 serial dilutions absorbance and the stir cell diffusion experiment.
I realized last week that I had made a pretty substantial mistake with my quantification which involved my mass standards. Half way through running the gels for the previous study I had accidentally started making my mass standards at a higher concentration but counting them in the quantification as their initial value. The bottom line…
I got three pinhole-free membranes from Karl after the inspection. They are from wafer#612. Locations are (-3, 1), (-3, 2), and (-3, 3). I used the UV/Ozone machine to oxidize and charge two of them while leaving the third one as a control. The protocol of UV/Ozone treatment was followed. The stir cell was set…
I discussed with Jess the possibility of using a negatively charged dye. People did use such dyes before but we probably need to order them at this time. Since now we can use the spectrophotometer to determine the concentration of a solution, we might be able to make use of the potassium permanganate (KMnO4) solution…
I’ve upgraded the WordPress publisher to version 2.6. The most useful change is the ability to track changes to any post/page, compare revisions, and revert to an older version. Here’s a video showing the changes: https://videopress.com/v/mARhRBcT/fmt_std Additionally, I’ve installed some plug-ins that should make posting and keeping up with new posts easier: There is now…
As mentioned previously intact membranes show a flux comparable to membranes with pinholes during desalting experiments. To confirm this a third intact membrane test and two pinholed tests were run under the exact same conditions. Previous pinholed samples had different NaCl solution volume in the SepCon, I wanted to remove any variability caused by this….
A few weeks ago Dave dropped of a humidity monitor for the third floor equipment room. Since then I have been recording the humidity every time I run a UV Ozone process for PDMS-glass or PDMS-pncSi bonding and there seems to be a correlation between the two. Over the last week there seems to be…