Lab tours on Friday
Prospective Graduate Students will be touring the lab this Friday from 12:30-1:00. Please be working in the lab and ready to engage!
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Materials in contact with media in micropump
The pump’s data sheet (located here) describes the pumps materials as: polyphenylene sulphone (PPSU) polyimide (PI) nitrile butadiene rubber (NBR) It also says that the acceptable particle tolerance is < 50 μm. This is the info we will need to determine the types of particles we can use with an in-line flow system.
E-beam Deposition of Ag, Cold ALD Runs, and Sepcon Assembly For Making a Nanofluidic Transistor
Last week I conducted a variety of experiments to try to make a nanofluidic transistor (a device described in detail in this previous journal club post). I did some light optimization of the E-beam deposition of Ag films over a 3nm Ti adhesion layer in the PVD lesker machine and found that 12nm of Ag gives…
I’ve looked at 100 nm Membranes from both sides now…
While JK has been processing backside images from 50 nm, 75 nm, and 100 nm membrane SEM images for pore information, I thought I’d take a look at a 100 nm membrane from both the front and the back at the same spot. Here are the images referenced to a corner of the trench. The…
Pore Density vs. Pore Radius Graphs, 15nm width and 1000RTP
The purpose of this post is to see if there is a pattern in the Pore Density vs. Pore Radius graphs at certain manufacturing conditions. The following wafers all have widths of 15nm and RTPs of 1000. The porosities range from 6.48% to 8.33%. **** note: the y-axis label should actually read “pore density (#/nm2)”…
Permeance and Hydraulic Permeability of ~500 nm pores in 5-slot chips
Permeance Testing Sepcons were built with 500 nm 5-slot chips. Permeance tests were performed on Samples A-C. Nitrogen gas was pushed through the membrane at a given pressure, and the height on the flow meter tube (green graduated column pictured below) was recorded according to the location of the center of the silver ball. No units…
BSA-Au results
w312 Number of Pores HistogramContributed Area Histogram 5nm BSA-Au is detected in the filtrate after 24 hours. 10nm BSA-Au is not. The 5nm registers around 10nm after conjugation and the 10nm is closer to 15nm. This selected membrane is not very porous, although it does have pores (as high as 42nm) that would appear to…