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Updated: Continued Au separations with SiN-NP wafer #'s 1029 and 1030
Sarah and I did some more gold separations with 10, 20, 40, 50, 60, 80 and 100 nm Au particles. We used the “clean” water purchased from the medical center. Same as last time, we diluted the “as-bought” gold 3 parts to 1 and loaded each cell with 300 uL before pressurizing at 5 psi…
Conditioned DMEM – re-try
Last week, I did a couple experiments based on a suggestion by Tom. The pH of DMEM starts out quite high and then buffers down into physiologic range after some time in the incubator. Tom surmised that a short exposure of the chips to high DMEM pH might hasten discoloration. To test this out, I…
15nm oxide influence on air permeability
The graph below is air permeabilities for four samples from wafers 344,338,342,345 without and with 15 nm thick deposited oxide on the front side. All of this samples don’t have pinholes.Look at the data for samples 2 and 4 on the graph. The approximate porosities of these samples are 2.7 and 4.6% which is the…
Pre-spring lab clean! (and o-rings)
Let’s get a blast-from-the-past and go through a bunch of drawers in the lab! I spoke with Jim and it seems like it might be best to schedule it during next regularly slotted Tuesday NRG mtg. So let’s plan on meeting downstairs in the lab on 2-19 at 9:45 am. Also, I bought an assortment…
Boron doped c-Si substrate to create silicon lattice under membrane
Hopefully many more details to follow, but JP, Josh M. and I doped some Si substrates with boron using a spin-on-glass. It seems well known that heavily boron doped Si is more resistant to EDP etch than intrinsic or n-type material. We went big and used the 3-slot SEPCON mask. So at…
Critical Flux Control Experiments Across Three Different Wafers
Hi everyone, this is a short post quickly detailing some interesting quirks of different wafers as their respective chips are subjected to a control experiment (1x PBS, Qs = 30 ul/min, Qu= 10% Qs every 45 minutes). First, lets look at 1256 (2.7% porosity, avg. pore diameter 33.2 nm). These results are a nice baseline…