Scott Russell from Mech. E. and Steve Gillmer came over to help Sarah and I try to record the burst of membranes at up to 2000 frames per second.  Generally we used 100o frames per second because it was the…

Overview: The goal of this experiment was to determine which membrane type adipose derived stem cells (ADSCs) would proliferate best on. The ADSCs grew over a  four day period and were imaged on days 1, 2, 3, and 4.  The cells…

Our main purpose of this project is to reduce or eliminate the protein non-specific adsorption on the oxidized siliconnitride sample surface. By synthesis the PEG molecular on the surface, we believe we can reach the goal. There are different ways…

Today, I finally demonstrated liftoff of microporous SiOx from a bare Si wafer.  The sample is a 2 x 2 cm section of wafer 209A02, which has a 100 nm layer of TEOS SiOx that stress stabilizing anneal.  The film…

We had previously tested different surfactants to see if we could get 20 nm polystyrene beads and IgG to stay in suspension while filtering with the centrifuge.  We found 0.1% Tween 20 to be sufficient when dealing with 10:1 (5×10^14)…

We have previously tested the effects on filtrate volume after a given time as a function of concentration. Moving forward we want to quantify the improvement in filtrate volume when using reverse centrifugation instead of forward centrifugation. Initially, we attempted…

Very last minute but here goes … Voting closes at 7 pm tonight. Vote for 2! [yop_poll id=”4″]  

Bhimani(Ward)10NDT This is a useful paper for our work on Hemodialysis. The authors examine the clearance rates of urea, B2 microglobulin and phosphate as a function of dialysate flow rate . Two things surprise me in this paper: 1) the…

I have been exploring the efficacy of different methods for removing the native oxide from the surface of the sacrificial silicon layer prior to liftoff etch with XeF2.  As a reminder, with liftoff of SiN membranes, one can simply dip…

MAKING CHIPS We now have our own SU-8 mold (with the help of Brian & Alex at URnano) and have started producing chips (see below) with our channel designs.  Together with the chips produced last week, we have accomplish one…