Quote from Micropen

I went through and characterized each wafer by thickness and RTP. I graphed “Average Pore Size vs. Porosity” and “Average Pore Size vs. Cut-Off Pore Size” for each processing condition that had at least four representative wafers. ** Yesterday, Professor McGrath and I had a quick chat about the data. I have inserted a few…

First off – OK now on to the science. Wafer 747 has a huge amount of pinholes, and in this study I wanted to see how these pinholes would effect electroosmosis.  I will show results here from two experiments with these holey membranes.  These membranes have a lower rate of electroosmosis than previous tested membranes. …

I brought some 20nm and 40nm Sepcons to Integrated NanoTechnologies last Wednesday. First, we passed some short radio-labeled DNA strands through a 40 nm Sepcon, and then some longer strands. Both were able to pass through the membrane with a transmission rate of ~70% (as measured by scintillation), and the length of the strand did…

When we submitted the EO paper way back one of the reviewers made the following comment … What is the “head pressure” P_max, i.e. the maximum back pressure that would stop the pump? For any linear electrokinetic phenomenon such as EO pumping, the flow rate decreases linearly with backpressure until a certain point (“head pressure”)…

Fluorescent beads were employed to assess electroosmotic flow in various devices. The beads were 200 nm in size and were negatively charged (on account of being carboxylated polystyrene). These beads were suspended in a 0.2 mM K2HPO4 buffer. They were also incubated in 1% BSA solution in an attempt to reduce their surface charge, though…