Viscosity vs. [BSA]

I recently tested the burst pressures of samples from W510, 511, and 513. None of the membranes are pinhole free. Silicon thickness varies (15 nm, 10 nm, 20 nm). See Dave’s post for complete fabrication information. W513 has noticeably higher burst pressures compared to W510 and 511. Overall W510 is in the worse shape overall,…

In the last post, we have discussed the intermediate state of the membranes which shows the irregular shape pores and silicon nanocrystals after annealed at 700C. Last week I did a quick test on the same nitride membrane with a different annealing process to verify this intermediate state. I run two different heat treatments. The…

A few weeks back I had finished my streaming potential/electro-osmotic pump setup. It looks like this: For streaming potential measurements, we pressurize a tube filled with 100mM KCl that connects to the membrane and measure the voltage drop across the membrane. When I first applied a pressure to the setup, the voltage drop did seem…

This device was built similar to the device featured in the Burns(Zydney) 2000 J. Mem. Sci. paper.  Our device seals in a SepCon formatted pnc-Si chip and allows 2 electrodes to be positioned by the chip.  A feed line pressurizes the chip with saline, and the generated potential can be measured using the electrodes.  The…

Based on last week’s lab meeting, I made a “solution array” to test discoloration.  Specifically, I made 3 solutions of NaHCO3 (0, .23125, .4625, .925 mg/mL) and 3 solutions of NaCl (0.1, 0.5, 1 M).  I placed these non-RTP’ed w648 chips in the oven at 37C and took pictures at 4, 18, 72 and 120…