I took a sample from w304 over to the Krauss Lab and had them try to image it with AFM. Here are a few pictures (for some reason the color scales weren’t included in a couple of them, but they…

I ran a series of serial dilutions with the rhodamine, to find the absorbency using the spectrometer. Below is a graph of the concentration of rhodamine versus the absorbency. I removed the concentrations which had absorbances greater than 1.7 AU…

Last week Jess helped me set up the diffusion cell with human albumin and cytochrome c. We ran 3 cells and used membranes from wafer 565. The membranes used were -1,4 (retentate 1), 3,3 (retentate 2), and 4,2 (retentate 3).…

As Jim suggested, we are not only going to reproduce what Chris and Tom did in the Nature paper but also trying to test the charge screening effect based on different salt concentrations. To do such experiments, we need to…

Hi all, you might have read that we (Mike and i) have 100 % bonding efficiency in our latest PDMS-Si wafer bonding.  On that same trial we have also successfully bonded PDMS to the new pnc-Si that Dave made for…

Hi All, Recently we have good results showing that we can bond PDMS to both glass and Si-wafer with UV Ozone treatment. We can even bond the PDMS to pnc-Si directly, although it is not clear whether the sealing is…

Recently I tested track etched membranes and crystalline silicon (basically the backside of the membrane chips) following the sample buffer adsorption assay. This new data comprises the last two bars on the following chart. I’m surprised to see that crystalline…

I’ve added a page on cell culture applications to the knowledge wiki. Watch this page and edit it if the topic is of interest to you. Remember the wikis provide a place to comment on the changes you make ……