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Chemical Stability of W613
W613, the wafer with 30 nm thick pnc-Si was tested for chemical stability. This wafer was shown to be very weak mechanically, with burst pressures less than 1 PSI. I tested this wafer for chemical stability with cells (fibroblasts, P26) in DMEM +10% FBS (n=5). I also monitored discoloration in DMEM +10% FBS w/o cells…
Kilean’s JMS Paper Figures
ByKileanHi All, This post is more of a dump of figures that I have put together for Dan’s and my upcoming Journal of Membrane Science manuscript. I have included figures and captions, so any feedback would be greatly appreciated.
AFM Scans of NPN, MgF2, and Au-coated Membranes
With my TEM tilt stack work, we can see a marked difference in the roughness of npMg2 and NPN. Quantifying the bulk roughness properties of the npMgF2 using AFM gives us a way to check that property. Surface roughness has been known to effect SERS activity in other substrates, and our current hypothesis is that…
Ibidi (Rev B) Device
Introduction This post is meant to introduce the new NPN-enabled slide-based devices produced by Ibidi. These devices feature an NPN membrane and microfluidic channels positioned perpendicular to one another formed by PSA and COP layers (Figure 1). Channels above and below the membrane allow for flow-based experiments including tangential flow filtration (TFF) such that biofluids…
Alternate Metal or Metal Oxide Nanomembranes
I have wondered if it were possible to create free-standing, nanoporous nanomembranes out of other materials (rather than my MgF2 process). The process is general enough that it should work. The major factors are Etch Selectivity between the substrate and the deposited material Film Mechanics (some films tear themselves apart due to the relative sizes…
TEER and Pinholes
One of Christine’s projects was to determine if pinholes affected electrical resistance (TEER) measurements. She summarized her work here. I collected her data and did some negative controls to finish this work up. Here’s the graph: The “no membranes” data is from Sepcon transwells with pnc-Si chips but without membranes (I broke them before assembling…