This is a follow up to Josh’s post, “Continued Au Separations with SiN-NP wafer #’s 1029 and 1030”, and seems to explain why we initially got an S value greater than one during our gold separations. We conducted tests to see if the colored centrifuge tubes were at fault for our seemingly large filtrate absorbance…

As I mentioned in my previous post, there are a lot of problems associated with the technique for testing the ability of a CytoVu assembly to act as an assay that I had been trying to use before. Several possible sources of error were apparent, such as the difficulty inherent in consistently pipetting such small…

Here are some other in-situ heating videos I made recently. First one is NSN30730, which means the Si is 7nm and Si3N4 is 30nm. The speed of the video is 10 time faster than the real time. The first figure is the heating illustration and then comes with the video. The next is sample NSN301030….

This is a follow up to my previous post, “Burst Pressure Probability II”. I burst 111, 30nm thick single window pnc-SI TEM chips of ten different window sizes, to measure the burst pressure of chips with varying dimensions. Although area is a major determining factor in the pressure at which the windows break, two different windows of…

Sarah, Tejas, and I bought some “Invitrogen Ultrapure DI water” from the medical center to see if we would find a different permeability using the clean water vs the water from the Barnstead. Sarah and I repeated our permeability tests but made sure to measure the flow rate for the first 100 uL.  We got…

Hi all, Previously we described a two-compartment flow system integrated with a nanoporous membrane in between; and we showed that the nanporous membrane effectively reduces fluid flow from one compartment to the next. Seeing that today is our last NRG meeting this summer, I will present a revisit to the prediction of flow distribution within the membrane-based…

I’ve been working on building a streaming potential/EO device for a while now. This was Yaron’s prototype: Which itself was based on Jess’s design: I didn’t like that the device needed to twist together, and also that it was designed for the old circular 2-slot sepcons. My first prototype used the machine vise downstairs for structural…

Here is an interesting discovery of nanopores in the SiO2 layer after the laser annealing. Basically I was doing laser annealing on free-standing OS membrane the other day. It’s an excimer laser  with 248nm wavelength, 25ns FWHM and spot size of 2.6 mm diameter. Same setup we used before in ORNL. The sample we test…

Sarah and I did some more gold separations with 10, 20, 40, 50, 60, 80 and 100 nm Au particles.  We used the “clean” water purchased from the medical center.  Same as last time, we diluted the “as-bought” gold 3 parts to 1 and loaded each cell with 300 uL before pressurizing at 5 psi…