From Jess’ manuscript …
From Wikipedia …
From Tom’s ACS nano paper …
The Dagan equation (2) for flow through short pores used to predict flow through pnc-Si is given by:
where r is the average pore radius, DP is the pressure drop across the membrane, l is the membrane thickness and m is the solution viscosity. This equation becomes the familiar Hagen-Poiseuille equation in the limit that l/r becomes large.
These volume measures were conducted at 5.6 +/-0.2 PSI using the variable area sepcons with either a half slot, one slot, three slots, or the normal five slots. Note that the pressure was normalized via a pressure regulator, and this normalization was confirmed with a manometer. Filtrates were collected in a series of the…
This is some really preliminary data that I hope to add to in the next couple of days. Yesterday I prepared 4 SepCon samples from wafer 310. I spun them at 3.3 psi for 2 hours with just PBS. I recorded the permeability, and then performed the exact same test with 3mg/mL protein in the…
At some point, when things settle down, I’ll create a page dedicated to the TECAN machine and document all of the troubleshooting and tricks I’ve learned so far. Before that happens I have another mystery to solve. Take a look at the following three scans: This first are some scans of BSA filtrates from…
Last week I ran a series of membranes through the carbonization process at four different temperatures (600, 700, 750 and 800 C) at a fixed acetylene concentration (1 LPM). As expected, the growth of the carbon ring around our pores is temperature dependent. Note: image processing was done on 100 kx micrographs with the exception…
I have done some furnace annealing (FA) on free-standing NSN and OSO stacks in last two weeks after the RTP was down. I’ll show the results in the following two posts. In order to compare the annealing result, I chose both NSN and OSO stacks with the same structure of 30-25-30, which corresponding to 25nm…