Shear Free Chemotaxis Manuscript (Submitted to LOC)

Here is the figure we talked about in the last meeting. For each specific membrane, I’ve plotted both the experimental permeability and the permeability calculated from the theory. You can see in some cases they are close, but in others they can be pretty far off. Omitted from this chart are retests. Updated: Graph is…

Initial studies into the mechanical properties of pnc-Si were carried out using the “bulge test”.  With JP’s help, we’ve collected a large amount of pressure-displacement measurements.  This technique has been used to investigate thin film membranes suspended over windows of different geometries e.g. Vlassak.  In this study, we measure the deflection of a pressurized membrane…

In this post I look at our membrane resistance and compare it to the best performing alumina membrane. Here is the resistance figure I made for the paper: This figure shows the device resistance with and without a membrane.  The membrane resistance would be the difference between the white and grey bars.  We would like…

First off, a quick update on the state of the lab. The day finally came, we had to pack up and put everything in storage, so unless there is a very pressing need, I’m done data collection for the time being. I don’t think that will be a problem; we have enough for publication as-is,…

Here is an attempt at the active area figure using the “newer” EO membranes (SC172).  Here is the raw flow data for the three membrane sizes: If we take the slopes from this figure, we get the flow rates in uL/min.  We can then plot against active area: We get a pretty nice fit here,…

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 the sample in BOE solution for a few seconds to strip the native oxide.  This…