The purpose of the fluidics in our hemodialysis system is to move the sample to and the retentate away from the membranes. The dialysate (permeate, filtrate) will be handled passively in the initial designs and therefore do not require fluidic…
Category: NRG
Morphology evolution in pnc-Si membrane(2)
In the last post, we have discussed the intermediate state of the membranes which shows the irregular shape pores and silicon nanocrystals after annealed at 700C. Last week I did a quick test on the same nitride membrane with a…
Posted in NRG
Hemocompatibility of pncSi – Platelet activation studies
This is the first set of studies to assess the hemocompatibility of pncSi surfaces based on the paper by Fissell and Roy. It looks for the behavior of platelets in the plasma upon interaction with pncSi surfaces. Biological Motivation: Platelets…
Posted in NRG
MEM Elution Assays on pnc-Si Membranes – Rotation Summary
The minimum essential medium elution assay with neutral red is a commonly used method for determining the cytotoxicity of a material, typically polymers1-4. The neutral red dye is only endocytosed by viable cells; relative viability can be determined by absorbance…
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Morphology evolution in pnc-Si membrane
In this post, I would like to sum up all different annealing scenarios, which corresponding to different morphologies of the pnc-Si membrane so far we have observed. It should be very helpful to understand the evolution of the pore formation…
Posted in NRG
pnc-Si membrane from silicon nitride and silicon oxide system
Now we already confirmed that pores are able to form in both oxide/silicon/oxide and nitride/silicon/nitride system. Here comes an interesting question- how about nitride/silicon/oxide and oxide/silicon/nitride system? In the past week, another two different stacks including SiN(30nm)/ a-Si(25nm)/SiO2(30nm) and SiO2(30nm)/a-Si(25nm)/SiN(30nm)…
Posted in NRG
High porosity pnc-Si membrane from nitride/silicon/nitride stack
Last week, I deposited silicon nitride/ amorphous silicon/ silicon nitride stack and then annealed the free standing stack after etching the substrate. The nitride film was deposited with 25W bias and the silicon film with 5W bias. The thickness for…
Posted in NRG
EO Update
On the 13th of September we reviewed our recent progress on EO. Maryna and Jirachai (Borkholder group) gave presentations. I’ve uploaded PDF files of each of their presentations. Maryna’s presentation: MarynaEO Jarachai’s presentation: EO_Testing_Report (PPT) EO_Testing_Report (PDF) Bubble formation in…
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Neutrophil activation on PEGylated glass surface
Hi All, This is my first blog on the NRG group. I am working on testing the biocompatibility and of PEGylated pncSi surfaces. To start with, I and Nakul began with checking the activation status of neutrophils on PEG treated…
Posted in NRG
EO with Ag/AgCl electrodes on membrane chip
I tried putting Ag/AgCl electrodes on the surfaces of the membrane for EO pumping. The experiments were done in RIT with Jirachai. In these experiments the goal was to observe the change in liquid droplet volume on the front side…
Posted in NRG
