Permeability and burst pressures data for new wafers

This post shows that C-dots are pretty close to neutral.  Here I’ve looked at gold nanoparticles and albumin. 5nm Gold: The distribution is very spread out, but everything centers around -58 mV. 10nm Gold: This sample looks a little bimodal.  Peaks are at -33 and 0 mV. Albumin: Much better than the gold samples.  It…

  I have been looking into PLA (Poly Lactic Acid) plastic for use in our microfluidics. PLA is a commonly used material in 3-d printers, so it would be great if we could print out our microchannels for cell-culture devices. To that end, I wanted to see if the PLA plastic would react with our…

Although the connection of those electrical circuits was always unstable, Greg and I did get some TEER measurement with this set up:   Device A Day 1 Day 2 Day 3 Day 4 Day 5 EVOM 1 -3450Ω* -1000Ω -1200 Ω -1000 Ω / EVOM2 100 Ω -9600 Ω 450 Ω -3 Ω 827Ω Device…

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 because those absorbencies created a greater deviation. The lower concentrations show a more linear distribution….

Here are the results of a protein ladder separation with w677.  If you recall, 677 is the 200um wafer that did not fit into the SepCons but had very few pinholes. S = Standards Ladder, C = Protein solution that never came in contact with membrane, R = Retentate, F = Filtrate Myosin (Band at…