New sputtering system
The new sputtering system is scheduled for delivery at the end of June. It will bring several advantages over our current system; which translates (hopefully) into stronger and more consistent material. 75 days…
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First 4-Hour HD with 75-nm NPN
I assembled two 2-chip dialyzers using the thicker, 75-nm NPN membrane chips (10 mm long multichannel, 22 mm x 24 mm). The dialyzers were pumped full of IPA, to fill with fewer bubbles, then infused with PBS for at least one hour. Unfortunately both of these either broke when hooked up to the animal, or…
Annealing w/o protective oxide
Here is a summary of results for membranes (w510X) that have been annealed without their protective oxide. 800 C RTP @ 10 C/s in susceptor 850 C RTP @ 10 C/s in susceptor 900 C RTP @ 10 C/s in susceptor 950 C RTP @ 10 C/s in susceptor It seems that annealing between 800…
100K Microcon Hydraulic Permeability
ByMike HI ran the same 100K microcon system through numerous pressure ranges and put together the spread of hydraulic permeability results.These results show that the hydraulic permeability of the microcon membranes decrease with increasing pressure. Once I finished running the tests at these pressures I reran a test at 19.52psi (3800RPM) to see if we would…
Disposable PDMS diaphragm pumps
In order to include pumps on the prototype blood analyzer cartridges, it was necessary to implement a small pump using the existing knife-cut PDMS layer layup technique. The diaphragm architecture was selected due to ease of operation and minimal additional part requirements. CAD model of pump in Autodesk Inventor Bottom view of fabricated pump. The…
TEER measurement data and a video of concurrent measurement and microscopy
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…
Silica NP sizes
Hybrid silica studies the size of their particles by fluorescence correlation spectroscopy. I used our dynamic light scattering instrument to see what sizes it would get from these particles. Their 45nm particles: Avg center of peak = 46.2 nm Avg width = 15.6 Their 22nm particles: Avg peak center = 27.8nm Avg width = 7.5nm…