I have just completed testing and documentation of a MATLAB GUI designed to allow anyone to make predictions of the clearance behavior of solutes though our membranes in tangential flow. I’m uploading the file here, which includes all the MATLAB code for the GUI, dependancies, and documentation. It will also appear under the resources tab on the main page of nanomembranes.org.
Because I’ve been having such a difficult time measuring consistent zetapotentials (a big and heartbreakingly inconclusive post on those efforts is forthcoming) I decided to use one of my silver-coated SNMs as an EO pump and see if changing the voltage applied to the membrane changed the rate of EO. And I’m very happy to…
I treated samples from w312 using our ozone equipment. Quickly, here was the protocol:Place samples in chamberTurn on O2 and supplemental Ozone generatorAfter 3 mins, turn on Lamp in main chamber for 5 mins (Heater set to 110C)Leave samples in chamber for 15 minutes after timer turns off(O2 and supplemental Ozone should still be on)Turn…
I’ve become increasing suspicious of the membrane clogging during the hydraulic permeability experiments. I ran an experiment where I took three fresh samples (sc 582) and pushed water through for 5, 10, and 20 minutes. Ideally, the permeability would be the same for all three time points. However, I observed a decrease at each increasing…
Last week, we ran several wafers with a silicon target from Refining Systems (Las Vegas). In addition to the source material being different, the target bond was a silver elastomer vs. the typical indium bond that AJA uses. Below is a TEM micrograph of a comparison between the RS silicon and AJA silicon. Both these…
In the past, we have seen allyl alcohol treatment on silicon chips helps retain a low contact angle longer than a purely plasma treated sample does. This helps us maintain gold flow in a sepcon format for a longer period of time compared to untreated or a purely plasma treated sample. Untreated samples also will…
I talked with Jim last Friday about a second possible dialysis system using PDMS bound to a glass cover slip. I made a batch of PDMS and let it cure at room temperature over the past few days. Jim had suggested I try bonding the PDMS to a glass cover slip using the UV/Ozone system…