Wet Etching of Optical Thin Films As a result of Christian’s trip and Kevin’s discussions with me, I have been wondering if we could make nanoporous MgF2 membranes for Raman spectroscopy. Part of the appeal in using our Si-based nanomembranes is that the volume they occupy in the observation space is extremely minimal. Even…
Scope: ADSCs were cultured on the bottom of the Corning 0.4um translucent membranes in DMEM+ 10% FBS+ 1% Pen-Strep. After 6 hours, the membranes were flipped over and placed into a 24 well plate. Of the four membranes with ADSCs cultured on them, 2 of them were seeded with HUVECs on the top side of…
I updated the software for the SSI. The software seems to be working properly. There are some differences, most of which I haven’t fully explored. Notably, we can open and view log files easily with 3.8. It seems that we may need to alter all of our current recipes to make them compatible with 3.8….
We have considered SiN membranes in PDMS channels as EOF pumps and as constrictions for insulator-based dielectrophoresis (iDEP). For EOF, thicker membranes may yield greater flow rates. For iDEP, a smaller membrane porosity, meaning fewer, smaller holes on a given membrane area, are likely to result in more effective iDEP trapping of particles. I built…
This is in continuation to the studies that I published here. I used two types of membrane surfaces: nano nitride trenches (the back side of membranes) with pure nitride on the surface, and zero-second-etch nano nitride with a completely intact pncSi cap on the top. These two surfaces basically act as materials with two extreme…
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…
Back when I first joined the lab I did some experiments where I varied the pressure driving a gold filtration experiment. The critical plot was this: It seems unlikely that the sieving coefficient could change so dramatically with applied pressure, so I would like to repeat the experiments. Because the larger gold particles on…
Sealing Patch Clamp Chips Canadian Patch Clamp Chip I have been thinking about Handy Geldbard’s group and what would enable them to study groups of synapses. Currently, I am in discussion with Jennetta Hammond and Pat Lu trying to understand some of their needs and wants. First, I considered their use of small microchannels…
I have been working with JP over the past month to attempt to form a thin, continuous film of PdAg on a pnc-Si membrane using e-beam evaporation. The aim of this is to test these for selective hydrogen permeability at elevated temperature for hydrogen purification. We have made three attempts so far. We are using…
The group in the attached paper have found a way to form pnc-Si using PECVD. They use a 300-15-300 nm OSO stack with a 850 C (50 C/s, 30 s) RTP to form ~13 nm pores. SiMPore attempted this in the past, but was not able to form pores. Using PECVD would be faster than our…