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 20-25 ohm, much lower than previous measurement.
Possible reasons why lower resistance is observed:
1) “Au on top of Ti” vs. “Ti only”
2) better processing pressure resulting in much better film quality
Creating an array to hold a pnc-Si wafer to proving to be difficult. The PDMS spreads too rapidly though the NC to form a consistent array for the pnc-Si membrane (and eventually wafer) to rest on. I’m still running different trials of the PDMS on NC to see if I can get the array to…
Here is the current method that I am following to find the pore statistics: 1. Select the highest threshold that you can still close with disk of 3 2. Hit majority 3. Close w/ 3 4. — Try open w/ 3 5. Erode w/ 3 6. Dilate w/2 7. Dilate w/ 2 8. Erode w/…
A quick recap: Vaccinex has asked the lab to design a closed system device with the capability to co-culture on microporous membranes. This device would be used to mimic the blood brain barrier, with endothelial cells cultured on the apical side and glial cells cultured on the basal side, and would allow for the testing…
http://www.azonano.com/news.aspx?newsID=26865
Yesterday Henry and I went over to RIT to perform anodic bonding and parylene deposition using the new membrane configuration of W619 (with the etched trenches for our capillary tubing). I just wanted to post a summary of the process that was done yesterday, as we encountered numerous problems, in the hopes that we can…
Previous work on Tomograms: TEM Tomography of NPN and npMgF2 Previous work on reconstructing the tomograms: Manual Reconstruction of Electron Tomograms Introduction This post examines another set of MgF2 pores that Kilean acquired. I want to compare the inner pore morphology of two different processing flows for MgF2 nanomembranes, one of which gives us excellent SERS properties (250C…
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Please design another experiment that will let you confirm why these samples have much lower resistance. The more continuous gold will certainly help…