We got a bunch of extremely nice EO wafers through the pipeline, and I’ve been trying to do some experiments with them. There’s very few pinholes on these wafers, and the pores are beautiful. My experiments so far have been…
Category: NRG
Carbonization Contact Angles
To supplement the work that Dave’s been doing with carbonization, I’m doing some chemical stability/discoloration tests. The first step of these tests is to measure the contact angles. The following are images of contact angle tests and quantitative data from…
Posted in NRG
Carbonization is time dependent
After seeing a reduction of pore size at 750 C, I decided to run three different soak times at a fixed acetylene concentration of 1 LPM. As expected, the longer soak time resulted in more occlusion. It seems that the…
Posted in NRG
Burst Pressure Vs. Temperature of Deposition
Dave deposited a series of wafers last week at different temperatures. SC 166 -SC 173 were deposited between RT and 300C. These wafers had Jess’ E.O mask pattern ( circular sepcon) with single , 3,6 and 9 squares. The wafers…
Posted in NRG
Cellulose Separations
I set up separations with 100kD cutoff Microcon (cellulose) membranes and protein standards. Here are the results: Due to shorter than normal gel, the myosin didn’t get resolved. However we can see a separation that appears to be fairly sharp. …
Posted in NRG
AFM – PVP on pnc-Si
Tom gave me a few samples to scan on the AFM. PVP was added to the well side of the samples. I scanned the pnc-Si side of the chips to see if/how the PVP came through the pores. Samples were…
Posted in NRG
Carbonization is temperature dependent
Last week I ran a series of membranes through the carbonization process at four different temperatures (600, 700, 750 and 800 C) at a fixed acetylene concentration (1 LPM). As expected, the growth of the carbon ring around our pores…
Posted in NRG
Long term discoloration II
There have been differences between the previous long term discoloration studies carried out by myself and Barrett. Couple of reasons speculated for the differences were: 1) Wafer variation (w683 vs w704); w683: has no visible pores, is more amorphous in…
TEM of Particles
Here are the sizes of the particle ladder by TEM. I compare to the previous unmodified DLS results in this table. Manufacturer’s Size TEM size Stdev DLS Size 5 6.6 .6 8 10 7.8 .9 9.4 15 12.7 .9 13.2…
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B.P with Thickness of Material
In an effort to understand the material property using burst pressure, a few key variables have to be analyzed to determine their effect on burst pressure. These variables are: 1) Shape : a) Maximum Dimension of the slot. b) Minimum…
Posted in NRG
