I have been developing a microsystem for Paul Dunman’s group that will allow them to flow in bacteria, immobilize them on antibodies, and then subject them to varying concentrations of antibiotics. The full system will incorporate a fluidic mixer and…

Here’s the paper we’re discussing this week: Wu(Moulin)JMS14 The authors motivate their work by claiming that ultrafiltration membranes can be used to keep “engineered nanomaterials” (ENM) out of our waters.  They use confocal laser scanning microscopy to locate the position…

In this post I’m trying to give a better comparison among filtrations using chips from wafer 1085 using 20 and 100 nm fluorospheres, IgG, and 5 and 20 nm Au NPs.  In each slide I try to indicate the flow…

Hello everyone! I’d like to show you some recent result about pnc-Ge membrane. We have been thinking to replace Si with Ge for a long time to see whether we can transfer pore formation to another materials other than silicon.…

Update 8/15/14: Replaced the plots with updated versions including more data for NPN (now n = 3) and cellulose (n = 4,) as well as new high-flux polyethersulfone membrane data (n = 3.) I also dropped one clearly erroneous datapoint from…

Kevin was kind enough to share his presentation with us from his visit this July:   Here is the link on Owncloud:   http://drive.bbe.23a.myftpupload.com/public.php?service=files&t=c3eceae62439a478b4d1b676924e45ee

We’ve been doing a lot of work characterizing SEPCON performance in forward and reverse configuration.  One lesson we’ve learned is that a vertical orientation might be best for high particle concentrations.  I discussed this with Greg and he graciously came…

I posted previously about an issue we have with needing to strip the native oxide from the sacrificial silicon layer prior to performing the through-pore etch with XeF2 that enables separation of the oxide membrane from the wafer substrate.  The…

This is a followup to my previous post, found here. Some of the data in that post is now outdated and will be replaced with newer data here. I’ve added to the comparison the diffusion of cytochrome C and urea…