Committee Meeting presentation

Last week, I reported on the the morphology of pnc-Si deposited with different substrate biases. We hypothesized that the reason for this was due to the different initial film stress of the as-deposited a-Si. Unfortunately, the pressure-displacement method does not allow us to measure amorphous films since it requires the membrane to be nearly flat…

Thanks to Sidahmed Abayzeed and Emilia Moradi. Summary: I’ve started making impedance spectroscopy measurements with a potentiostat in the iBidi devices. The data is noisy, but there is a clear change in the curve characteristic as cells grow upon the nanomembrane. NPN seems to be working better than MgF2, for these measurements. I’ve measured the impedance…

Last week, I looked at discoloration with different wafer numbers (639,670,672,683,685,702,703), pre- and post-rebuild.  This experiment was done in the oven at 37C, in PBS and without RTP.   Based on the starting color, w670 and w672 are the thinnest membranes.  These discolored rather quickly (1 day).  The only other membrane that discolored over 3…

I’ve performed what might be the last test of the n-Dodecyl β-D-Maltoside (“DDM”) coating. This time I washed for three minutes each sample in HBS just like in the reference, used precisely the same concentration (and type, for that matter) of protein that was used in the reference, and tested a positive control, a negative control,…

I measured the I-V characteristics of our coated membranes on Wed. at RIT. JP observed the measurement. The semicon parameter analyzer in the test lab is “old” but isexactly what we need! Roughly speaking, our coated membraneshave resistance about 2k Ohm, depending on the thicknesses ofmetal films (this is based on pure Ti coated samples,…

Anant and I found a protocol in Biomaterials a few weeks ago that allows colorimetric determination of silicic acid.  It was used to track the degradation of PSi samples in Tris-HCl buffer. I optimized this protocol and got standard linear curves, as reported in the protocols section of the blog here.  Here, I report the…