I continued work with a couple of new wafers and settled on one that lowered the cut-off to between 5 and 10 nm gold particles. For completeness, I will also include some of the old data that has been further…

I had some old carbonized samples kicking around and decided to do some high res TEM yesterday to see what a completely occluded pore looked like.  Below is an image showing a blocked pore and adjacent Si nanocrystal. Inside the…

I took a look back through the Melvern data I collected, particularly focusing on changes in the intensity data in the BSA-DDM solution (the previously posted plots were of number data). When I compared the peak intensities for BSA, DDM,…

This previous post contrasted how gold could be separated by pressure in deionized water, but not by diffusion (w199).  I checked up on that diffusion sample again after 6 days, and while the retentate had mostly evaporated, there was no…

Last week during the deposition step, Chris and I discovered that part of the Cu “power cup” (piece that is bonded to target to make thermal contact with sputter gun) had eroded and coated the inside of the target shield…

The deposited metal thickness is 20nm, consisting of 10nm titanium and10nm gold. Post not finished. sc b020 – 25nm sc b011 sc b01

A paper by Munch (from Kodak), Zestar, and Anderson in J Mem Sci (1979) writes that charge has a big effect on albumin separations in track etched membranes.  They show in their paper that they can make the theoretical sieving…

I set up diffusion experiments using the wafers that Tom was able to pass gold through in DI H2O using pressure.  5nm particles do not pass in 24 or 48 hours.  If we have extra samples I will be testing…