Found a Master’s thesis from RIT that details etch rates for ITO films in Hydrochloric Acid. I originally attempted to do an etch using 1M HCl, but as the graph shows, this is not enough to produce an etch rate. I found this information out later, as 37% aqueous HCL = 12M solution, from http://openwetware.org/wiki/Hydrochloric_acid. Using…
In this post, I’ll mainly focus on the furnace annealing results of OSO stacks. The structure of the OSO stack is also 30-25-30, which corresponding to 25nm thick silicon layer and 30nm thick oxide layers. The annealing temperature ranges from 600C to 1000C with a 100C interval. Each sample was annealed for 30 minutes. The…
I recently bought some slides of ITO from Sigma-Aldrich, and have been working to integrate them into PDMS by using the same process as I did for the glass coverslips (seen here) The main differences between the glass coverslips and the ITO coated microscope slides are the ITO film, which seems to have different wetting…
The goal of the design is to design a system that can co-culture cells under varying flow conditions, measure TEER, and perform dynamic microscopy. Specifically, the endothelial tight junctions are the primary mechanism by which the BBB is regulated. It is thought that astrocytes and pericytes can influence this mechanism. With the completed system, we…
Hemocompatiblity of pncSi membranes was tested by checking for three main parameters: 1) Platelet adhesion, aggregation and activation studies 2) Complement protein activation studies 3) Assaying levels of thrombin generation All the studies and their assays were based on the paper by Fissell and Roy, who tested the same parameters on surface modified silicon wafers….
In early May, the Barcikowski lab shipped us four samples of gold nanoparticles for us to run separations on. They took forever to get here, and had aggregated and precipitated by the time they arrived. About a week ago, the lab sent another batch of four samples (which differed slightly from the samples they sent…
I have done some furnace annealing (FA) on free-standing NSN and OSO stacks in last two weeks after the RTP was down. I’ll show the results in the following two posts. In order to compare the annealing result, I chose both NSN and OSO stacks with the same structure of 30-25-30, which corresponding to 25nm…
What we’d like to have accompany the Sepcon filters is a general way to tune the pore sizes for any given separation. If, for instance, someone wanted to have a filter cutoff of 12nm, we could create a custom wafer with a mean pore size of roughly 17nm. But it would be much easier (and…
Purpose: The purpose of this investigation was to study the diffusion of Rhodamine, a florescent dye, in crosslinked Poly ethylene glycol (peg) using a Leica DMI 6000. Knowing the permeability of crosslinked peg is valuable as peg is a potential material for the hemodialysis project particularly the lift off component, and knowing about Rhodamine’s (MW…
SET-UP Syringe pump: 5 mL of 7.6-nmol/100µL, 5.6 µL/min pump rate. Single Channel dialyser, 10 mm long, 0.5 mm wide, 0.3 mm high in stirred beaker of DI water Fraction Collector programed to rotate every 30 min. Set up in refrigerator, 40˚C. Figure 1: Long term dialysis clearance set up in refrigerator. Syringe pump, stirred…