Background: In a prior post I showed that we had seeded cells on both nano- and micro-porous SiN Liftoff Membranes. The nanoporous proved to be rather weak and showed numerous broken windows after seeding the cells.   Summary/Conclusions: In this follow up post,…

In all of the below graphs, the x-axis has the same scale for easy comparison (-10 nm to 80 nm diameter). The Y-axis varies from plot to plot, but since we care more about pore density than actual numbers of…

The basic principle of inducing the osmotic pressure to suppress back pressure is based on the counterbalance of the opposing flows of solvent.  Consider an electrolytic cell composed of a pair of Ag/AgCl electrodes and a Nafion-coated pnc-Si membrane separating…

Aminosilane has been used widely to derivatize the surface of silica for the applications in analytical chemistry, biochemistry, and biomedicine. It also plays an important role in providing adhesion for Nafion coating on silica surface. The basic principle is described…

Previous posts: Theory Deposition Etching Imaging I have tinkered with the etch recipe some more, adding Argon to help prevent polymer formation (adding 5% O2 was not enough). The current recipe is 200 mTorr (100 mTorr Ar, 5 mTorr O2, 95 mTorr CHF3) at…

In the field of gas permeance there is a plot called the “Robeson Plot” (the paper that debuted it) that is used to compare the separation behavior of various membranes made of different materials and measured in different systems. An…

In my continuing efforts (previous post) to create a nanofluidic transistor, I recently repeated some of my earlier attempts to prototype a basic Si-Ag-Al2O3 stack. This time, however, I used SiN chips from wafer #1070 (<40 nm>). As before, I…

In this post I’ve detailed my attempts and eventual success (with Josh’s help) to get the ALD to coat TEM grids without blowing the delicate chips around. The actual technique is at the end of the post, beginning with the…

Here are some images of deposited magnesium fluoride films on 50 nanonitride:              

On Friday, Henry was kind enough to ship 15 tested Sepcons to the Barcikowski group in Essen, Germany. With luck they will arrive in time for Christmas. I wrote up some documentation and an illustration for wetting and using the…