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Web Dev 2.0
ByJimCloud based storage and calendaring functions are up and running. Log-in and password When you reset your password using this link, you will be reseting your password for all aspects of the web site: authoring, cloud, calendar, and wikis. If you have trouble, try a password with at least 8 characters and make it more complex than…
shear stress reduction via pnc-Si: analytical solution REVISITED
ByHenryHi all, A while back (in the link below) I have posted the analytical solution that allows us to solve the flow rate distribution in our shear-free system. shear stress reduction via pnc-Si: analytical solution However we do not have a closed-form solution at that time. After a brief discussion we believe that there should…
Are those pinholes or micron-size pores?
ByJoe QiHello everyone! After a long time waiting and setting up, the new AJA and RTP at Vanderbilt University now are ready to go! Here are a couple of pictures of the new AJA and RTP. I have been working on testing the new AJA for a while with my old recipes. The new AJA system…
A Power-free Pneumatic System for Controlling Fluid Flow
ByMeng HsuIntroduction When searching for a flow control system for microfluidic cell culture, we look to balance the ease of use, accessibility, and precision of fluidic control. For instance, researchers have explored different powered actuation methods for miniaturized precise proportional fluid control. These actuation methods include electromechanical, electrostatic, electromagnetic, piezoelectric, and thermal-based. The necessary power sources,…
Nanovoids in thin films
I’ve been doing some reading, and came across this article by researchers at Sandia Nat’l Labs. They are looking at the stress evolution in thin films, and have observed “nanovoids” in their amorphous silicon. Here is a cross-sectional TEM image (XTEM) from the article. Floro et. al. PRL 2003 There are three layers of a-si…
Liftoff Membrane Capture for Hemodialysis
As part of our work on the NSF STTR grant for our hemodialysis device, we need to develop a device to incorporate our liftoff membranes into to facilitate the fluidics. In this post (and likely, in another post later this month,) I will chronicle my contribution to this aspect of the project: finite element modeling of…