Katia Lyubarskaya in Alex Shestopalov’s lab has been testing different surface conditions of oxidised NPN membranes. I’ve placed her data below. (We used chips from wafer 1070) We started by looking at chips that received different chemical/plasma/thermal processes to…
Author: Josh Winans
Josh is a postdoc in the McGrath lab working on disruptive membrane technologies.
Synergistic Control of Mesenchymal Stem Cell Differentiation by Nanoscale Surface Geometry and Immobilized Growth Factors on TiO2 Nanotubes
von_der_Mark_2012 Here is some data on cell growth on different porosity TiO2 nanotubes. The above paper is an earlier publication regarding the work presented in Poster form at PSST 2014. Below are photos taken from the 4 quadrants of the…
Posted in NRG
Notes from PSST 2014
The International Conference for Porous Semiconductors Science and Technology, 2014, was last week in Benidorm, Spain. Jim was kind enough send me to represent NRG. Dave Fang gave a great talk at PSST based on pnc-Si data in 2010. Here…
Posted in NRG
Labsmith microfluidic pressure sensor (updated)
I’ve been trying to do separations with the NPN 5-slot filters by driving the solution with a syringe pump. This type of separation is required by INT for use in their cartridge. Unfortunately, at most concentrations, solutions with fluorospheres tend…
Posted in NRG
Continued Reverse centrifuge tests
Our first attempt to “reverse” centrifuge materials using our standard 5-slot filters made of NPN from wafer 1070 are detailed in a previous post using GEN2 SEPCON assemblies. In this post we modify our method to more closely match the…
Posted in NRG
“Reverse” centrifuge seperations
Back in November we were visited by Tom Berkelman of BioRad to see if he could use our NPN membranes to successfully separate some proprietary nanoparticles from IgG in a solvent with secret ingredients. These particles have an interesting absorbance…
Posted in NRG
Wafer-scale permeance test
(Meghan Kazanski actually did all the work, but she didn’t have a login when this post was started.) The calculated porosity is 16.4 % with an average pore diameter of 417 nm. SepCon assembly was performed with chips from…
Posted in NRG
SSI RTP software updated to version 3.8
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…
Posted in NRG
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…
Posted in NRG
pnc-Si from PECVD
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…
Posted in NRG
