Wafer 416-T is a TEOS wafer annealed at 900 C. Pinhole density is relatively low. left: (1,0) @ 35kx; right (0,4) @ 35kx left: (1,0) @ 50kx; right (0,4) @ 50kx
Category: NRG
SEM images of vertically cut track-etched membranes
TE membranes were first embedded in plastic material and then these samples were cut with microtome and imaged. The images below are of the 30nm and 80nm pore diameter membranes. 30nm ones came out better. It looks like the diameter…
Posted in NRG
Wafer 398
Wafer 398 was deposited on 2/14/2008 but just etched yesterday in the new cell (it’s a beauty esp. when you compare it to the old one). I’ve etched several wafers now in the new cell and none of the membranes…
Posted in NRG
Wafer 415-T
Wafer 415-T has been delivered to the lab. It was processed with TEOS and annealed at 950 C. There are a few usable samples, especially along the edge of the wafer. Pinhole density increases as you move towards the center.…
Posted in NRG
Gold Trials
Most recently I’ve been working with colloidal gold nanoparticles (referred to as AuNP from here on). We chose to use AuNP for separations because it is an ideal hard sphere particle, unlike a floppy protein. We thought we could achieve…
Wafers 398 and 418: Burst Pressure
Transferred from other blog… Wafers 398 and 418 were recently tested for burst pressure. Wafer 398 had a burst pressure range of 4.28-8.24 psi, with the great majority of intact membranes on the wafer having no or one tiny pinhole.…
New sputtering system
The new sputtering system is scheduled for delivery at the end of June. It will bring several advantages over our current system; which translates (hopefully) into stronger and more consistent material. 75 days… AJA Sputter Full Blueprint
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HUVEC on pncSi
In order from left to right: 1) t=0, huvec on pncSi, in EGM (10% FBS) 2) t=24 hrs (cells reach confluence) 3) DIC after staining 4) FITC (live cells) 5) Rhodamine (dead cells) Its good to see the cells reach…
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Track-Etched Permeability as predicted by Sterlitech
I constructed a plot of hydraulic permeability based on the flow rates that Sterlitech has predicted for their membranes. Looking at the permeability values that I posted last week, outside the tested that appeared to leak, there was a 0.01um…
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Update on Track-Etched Membranes
I ran some tests today using the 0.01um, 0.05um, and 0.10um pore diameter track-etched membranes from sterilitech. The tool the paul built to cut the membranes works very well, and assembly into the microcon systems it simple. I used the…
Posted in NRG
