Updated Burst Pressures Picture

Ring Resonators are photonic structures that have a very repeatable behavior. As light is guided along a path, it can evanescently couple into a very closely positioned wire (submicron gap). If the wavelength of light is just right, constructive interference can occur, causing the rings to resonate (lost through scattering). Necessarily, this causes a drop…

I ran the same 100K microcon system through numerous pressure ranges and put together the spread of hydraulic permeability results.These results show that the hydraulic permeability of the microcon membranes decrease with increasing pressure. Once I finished running the tests at these pressures I reran a test at 19.52psi (3800RPM) to see if we would…

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…

Back when I first joined the lab I did some experiments where I varied the pressure driving a gold filtration experiment. The critical plot was this:   It seems unlikely that the sieving coefficient could change so dramatically with applied pressure, so I would like to repeat the experiments. Because the larger gold particles on…

This post offers an update on membrane fabrication through nanosphere lithography (NSL), describing in more detail the releasing step as well as the membrane integration into PDMS devices. Membrane lift-off is achieved by dissolving a ZnO film underneath the membrane. After fabrication the sample is immersed in 1M HCl solution. The figure below shows a…

This is a draft of a figure I think I’d like to use in my upcoming paper about charge based separations (this paper will include the Bernhard data).  I thought I’d post it here first to get some feedback.  I’ll first discuss the figure and then outline the problems that I see. Panel a. shows…