The controls of the micropump are in units of frequency, voltage, and wave form, not in flow rates. Based on the manufacturers website they claim that the flow rate has a linear relation with voltage. I took some time to create calibration curves at two fixed frequencies (50Hz and 150Hz). I simply allowed the system to run into a test tube for a specific amount of time and obtained the mass after (knowing the mass of the empty tube).
From this updated post its evident that the O2 RTP treated samples start discoloring after ~10 days. Also, the O3 + O2 RTP treatment is probably better in preventing dicoloration than just O2 RTP. So amongst all the samples, the O3 + O2 RTP treated one starts discoloring at the last.
Just wanted to post an update on the creation of a counter flow system using the pncSi chips from wafer 619 (the wafer with the etched trenches for the insertion of capillary tubing). Over the past few weeks Henry and I have been able to produce a few functional counter flow systems using UV Ozone…
A few weeks ago, professor Mike Aziz in Harvard University helped to annealed two samples and in-situ imaged the early stage of pore formation using their Jeol2010-hot-stage-TEM. The oxide seemed intact during the process. The sample was unannealed 20(bottom)/15(a-si)/10(top) three stack with removing the substrate. The first sample was heating to 693C. They took one…
The following plot is an attempt to summarize recent work measuring rate of flow through a membrane as a function of concentration. We investigated 100 nm NPs, (totally blocked), 20 nm NPs (partially blocked) and IgG (mostly passed). In all cases, the buffer used was 1xPBS and 0.1% Tween 20. This plot mostly shows the total…
Adding pockets (250 micron long, 76 micron deep) to the bottom of the channel (channel is 500 microns wide, 125 deep) in a 4 layer PETL (1 inch long chip) promotes disruption of laminar flow.
Hello Everyone, Kilean helped us to set a training session for NanoParticle Tracking Analysis (NTA) in UR Medical Center. For this training session, i had 4 samples including: Beads, Liposomes, Media + 10% serum, and PBS. Here is a summary of what we learned, i am also summarizing a paper that i found for comparing…
