I recently tested intact samples from W415-T and W416-T.
All samples from W415-T were completely intact except the one located 3.167 units from center, which had one medium pinhole.
All samples from W416-T were intact, but a few had irregular membrane shape, one with constant area and two with about +5% membrane area.
I thought that there may have been a leak to produce such high air permeabilities, but I checked and this was not the case.
We have considered SiN membranes in PDMS channels as EOF pumps and as constrictions for insulator-based dielectrophoresis (iDEP). For EOF, thicker membranes may yield greater flow rates. For iDEP, a smaller membrane porosity, meaning fewer, smaller holes on a given membrane area, are likely to result in more effective iDEP trapping of particles. I built…
The Wiesner lab at Cornell (whom you may remember as the discoverer of the neutrally charged but highly fluorescent “C-dots” Jess used for her charged-based separation work) are about to publish Asymmetric Organic-Inorganic Hybrid Membrane Formation via Block Copolymer-Nanoparticle Co-Assembly in Nano letters. Building upon their previous work on block copolymer self-assembling films, they have added titanium dioxide nanoparticles…
Silver chloride electrodes are useful for microfluidic devices since they can generate current below one volt. This allows them to function without fear of electrolysis confounding experimental results by way of gaseous clogging. Several different methods for coating silver mesh were tested to determine which would be ideal for future experimentation. These methods were as…
This device was built similar to the device featured in the Burns(Zydney) 2000 J. Mem. Sci. paper. Our device seals in a SepCon formatted pnc-Si chip and allows 2 electrodes to be positioned by the chip. A feed line pressurizes the chip with saline, and the generated potential can be measured using the electrodes. The…
Based on the results obtained yesterday with the closed flow cell we reran another trial today. The closed flow system we tested today was bound using UV Ozone treatment, surprisingly this system created a relatively strong bond despite our resent results. Once the UV Ozone treatment was complete and the system had bound vacuum grease…
Hi all, my name is John Cognetti, and I am a first-year PhD student in BME. I recently finished a rotation in the McGrath Lab. My goal was to measure changes in resistance across the membrane as the membrane becomes saturated with particles. Initially, the plan was to use Tejas’ trans-endothelial electrical resistance (TEER) setup…