I’ve written a quick SOP document reflecting the procedure that resulting in successful permanent PDMS-NPN bonding. The procedure described in this document has not been optimized and may include unnecessary or otherwise sub-optimal steps. These steps reflect the steps that WERE taken to achieve a successful bond, not necessarily the steps that MUST be taken. —…
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 is a pdf of all the abstracts: PSST 2014-Abstracts A quick summary would break the…
UPDATE: I have since ported the program into Matlab. If you open the following zip document(Archive) you can run Find_Sieving_Coefficient. You can select a results file and after ~5 minutes the expected sieving coefficient for the pore distribution is spat out. Using Wolfram Alpha’s Mathematica programming language, I’ve implemented an amalgamation of different mathematical models…
PLEASE read this journal article for NRG on Tuesday March 18th @ RIT (PDF links are at the bottom) Surface Chemical Modification of Poly(dimethylsiloxane) for the Enhanced Adhesion and Proliferation of Mesenchymal Stem Cells Shreyas Kuddannaya,†,§ Yon Jin Chuah,‡,§ Min Hui Adeline Lee,‡ Nishanth V. Menon,‡ Yuejun Kang,*,‡and Yilei Zhang*,† I’d like to discuss this paper…
I am working with different electrode materials as a substitute for ITO for my TEER measurement device. I used silver-silver chloride electrode and platinum-iridium ribbon (90:10) for that purpose. I made AgCl electrode by dipping about an inch of silver wire in silver chloride ink and letting it dry for half hour. I obtained the…
The basics of this device are… Blood flows through a filter made of zeolite containing nanofibers. While the blood flows transversely through the mesh, creatinine can diffuse through the mesh where zeolites stand by to grab them via size selecting capture. Their experiments were done with 190 µM creatinine solution. MW of creatinine is 113.1179…
Membranes Promote Endothelial Differentiation of Adipose-Derived Stem Cells and Perivascular Interactions Submitted to Journal of Cellular and Molecular Bioengineering (a BMES journal) ADSC-All-Figures FIGURE 1. Ultrathin microporous silicon dioxide (SiO2) membranes. (A) 300 nm thick SiO2 membranes were fabricated on silicon wafers and etched into 5.4 x 5.4 mm dies with 2 x 2…
I’ve spent a long time in lab trying to optimize the protocol for streaming potential measurements. The slope of an applied pressure vs. streaming potential graph can give us the apparent zetapotential through the helmholtz-smolachowski equation. The apparent zetapotential is a good measure of the surface charge of a nanoporous membrane, and since I’ll be…
Josh Miller came up with the idea of filling individual damaged membrane channels with PDMS so the rest of the chip could be salvaged. We worked on it this week, mostly Josh, and we developed a process using strips of silicone laid on the top (flat) side of the damaged channel and PDMS injected onto…
Darcy’s Law relates the volumetric flow rate Q through a porous media in response to a pressure gradient . … Where is the intrinsic permeability of the media, is the fluid viscosity, L is the length of the media that fluid must travel through to exit, and A is the cross section normal to the…