Effect of salt on pores (benchtop)

This is my (Jim) summary of the results thus far for NPN vs NPN-O and Front Side/Back side comparisons. More to come … *************************************************************************************************************   As thesis indicated, the thicker membrane is, the larger average pore size will be. From my process, the average pore size for 50nm membrane is between 9nm and 10nm; the…

Below is an optical image that shows the amount of area loss caused by the preferential EDP etch. Based on these numbers, our most recent membrane slits measure 115 um x 2014 um.

Charles developed a new microEO chamber, and I did some quick particle tracking experiments.  The fluid in front of the membrane was filled with 200nm fluorescent polymer beads, and the power supply was used to cause the fluid to flow within the chamber.  Bead speed was measured with Henry’s particle tracking programs. Picture of microEO:…

This post is a recap on the nanosphere lithography based membrane patterning process. The results shown here are from a non-optimized run of the process. The image below shows an overview of the fabrication process used.   Below you can see optical micrographs of an etch test we performed on a TEOS sample with the…

I’ve been growing brain endothelial cells on PET and pnc-Si membrane transwells for a variety of experiments, but mainly to measure the TEER (transendothelial electrical resistance).  TEER is used to track the integrity of cell monolayers grown on permeable supports.  As the monolayer gets ‘tighter’, the TEER increases.  PET membranes are marketed as transparent for…