MEMs and membranes: a Liver Assist Device

Figure 2 – Micro scale Experiments with 10 micron fluorescent particles and 8 micron pore size track etched membranes: A) Fluorescent intensity – time plot showing increasing in the intensity signal during the capturing step and decreasing for releasing step. B,C and D) Before capturing, After capturing and After releasing panels, respectively, including schematic images…

This past year I have been collecting burst pressure data on pnc-Si and NPN. The data for 30nm pnc-Si came from my previous post, “Wafer 1059: Burst Pressure Analysis”, which also includes a wafer map. This wafer had 7% porosity and an average pore diameter of 20nm. I tested square window sizes with side lengths of 0.1mm,…

In order to further test the model, I’ve set up additional rhodamine diffusion assays.  In each case, the setup is similar to the nanoparticle/protein/dna separations –  20 uL of .5 mM rhodamine on the top of a SepCon and 20 uL .1 M KCl on the bottom.  Two different membrane geometries were used so far…

Recently, Jim has purchased a Makerbot 2x printer for our group. I’ve spent the last few weeks printing and debugging. It has the capability to print many different types of material, along with 2 separate nozzles. I have been able to get many fine prints done with ABS plastic, and I’ve put together a basic…

I am trying to deposit metal on the membrane with minimal deposition inside the pores. The image below is an example of how the film quality and thickness change when the sample is positioned at different angles and distances from the source in the same deposition run. The schematic in the corner of each SEM…