Over the past month, I’ve posted some results of a colorimetric assay for silicic acid.  Previous posts are here and here.  These results showed that the assay detected silicic acid after pnc-Si and PSi degraded.  However, bare silicon wafers also…

Roundness vs. Equivalent Diameter plots for five eccentric wafers: There really doesn’t seem to be a correlation between equivalent diameter and roundness. However, there does appear to be a rough downward trend in SC 016 and SC 258. Mean Roundness…

Here are the updated pore processing graphs: The data spreadsheet: pore-processing-results Supplement (added 6/16/09): Here is the Average Pore Size vs. Porosity graph with the outlying data points labeled: After making this graph, I looked at the outliers to see if…

In an attempt to minimize flow due to salt gradients, we ran an experiment in which an intentional gradient was used to set up a slight counterflow from the filtrate to the retentate.  This was accomplished by having a 55mM…

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…