Here are two new designs for the new diffusion cells. Design_2 could be a better solution as it separates the two connections and uses screws to make the wire contacts to outside circuit. Please feed back any ideas to improve…
Here are two new designs for the new diffusion cells. Design_2 could be a better solution as it separates the two connections and uses screws to make the wire contacts to outside circuit. Please feed back any ideas to improve…
As per Jim’s suggestion, I coated wafers 335 and 341 with 40.6nm SiO2 on top and 42nm SiO2 at backside. The membrane cells have been passed to Anant and Maryna for chemical stability and air flow tests. Today I got…
Maryna told me the UV/ozone cleaner did not work (the blue light in front of the chamber did not light up) when she was working with Dave today. I quickly checked the machine and it is actually working properly. The…
Here are images of actin filaments on Formvar coated 200 mesh nickel grid. Actin filaments were polymerized exactly as before. TEM sample preparation procedure is: 1. add actin solution on Formvar grid and wait 90 sec 2. remove liquid, add…
Because our membranes are not mono-disperse, we often debate the relative contribution of large pores vs small pores in both diffusive and convective separations. Indeed it is possible that the way pores contribute to transport in these two modes is…
Dave and I characterized the membrane samples using the 4-point probe system at Kodak research Lab. It is NOT the previously discussed micro-4-point probe. The spacing between two probes is about 2mm. We first tested a quarter bare wafer#388 at…
A couple of summers ago a Penn State summer student named Joe Fantuzo was working in the lab measuring cell growth rates and cell spreading on pnc-Si membranes and comparing the results to glass coverslips and tissue culture grade plastic.…
Our two O2 regulators arrived this week (it figures we would have two to arrive within a day of each other after waiting for weeks to have one). Tom and Lingyun got to work right away. The image below shows…
Coming to a basement near you by the end of 2008 (assuming no delays that is). Pretty exciting in my opinion.
Samples are from wafers #316 and 318. This is the first time for wafer scale deposition. Processing conditions:1) chamber base pressure @ 6×10-7 Torr (previously @ 5×10-6 Torr)2) 15nm Ti + 15nm Au, no vacuum break Estimated “cell resistance”: about…